Free online tools that just work
Countdowns, calculators, converters and generators — fast, private, and free. Everything runs in your browser; nothing you type ever leaves your device.
New on ToolDune
The latest additions to the toolbox.
Fish Tank Stocking CalculatorCalculatorsHow many fish for your tank? Litres and adult fish size with community, cichlid and goldfish stocking rules, p…Laundry Detergent CalculatorCalculatorsHow much detergent per wash? Load size, soil level and water hardness give the right liquid or powder dose - a…Moving Cost CalculatorCalculatorsWhat should your move cost? Professional crew vs DIY van with fuel, pizza wages and boxes - with the access tr…Moving Boxes CalculatorCalculatorsHow many moving boxes do you need? Bedrooms and packing style give the box count, size mix, tape and bubble wr…Moving Timeline PlannerCalculatorsEnter your moving date and get the week-by-week plan: when to book movers, declutter, change addresses and pac…Heating Cost CalculatorCalculatorsWhat will this winter cost? Home area, insulation and heating system give the season bill, monthly figure and …Radiator Size CalculatorCalculatorsWhat size radiator does the room need? Area, ceiling height, insulation and window extras give watts, BTU/h an…Insulation Payback CalculatorCalculatorsWhich insulation upgrade pays back first? Draft-proofing, loft, walls or windows - annual saving, payback year…
Countdowns 44
Live countdown timers for the dates people care about — always accurate, automatically rolling over to the next year.
How Many Days Until Christmas?CountdownsSee exactly how many days, hours and minutes until Christmas. Free live countdown timer, updated every second …How Many Sleeps Until Christmas?CountdownsCount the sleeps until Christmas — one sleep per night, made for kids and families. Live countdown, always cor…How Many Weeks Until Christmas?CountdownsSee how many weeks until Christmas, with a live timer showing exact days, hours and minutes too. Plan gifts, t…How Many Days Until New Year?CountdownsSee exactly how many days, hours and minutes until New Year. Free live countdown timer, updated every second —…How Many Days Until Halloween?CountdownsSee exactly how many days, hours and minutes until Halloween. Free live countdown timer, updated every second …How Many Days Until Valentine's Day?CountdownsSee exactly how many days, hours and minutes until Valentine's Day. Free live countdown timer, updated every s…How Many Days Until Black Friday?CountdownsSee exactly how many days, hours and minutes until Black Friday. Free live countdown timer, updated every seco…How Many Days Until Thanksgiving?CountdownsSee exactly how many days, hours and minutes until Thanksgiving. Free live countdown timer, updated every seco…How Many Days Until the 4th of July?CountdownsSee exactly how many days, hours and minutes until the 4th of July. Free live countdown timer, updated every s…How Many Days Until Mother's Day?CountdownsSee exactly how many days, hours and minutes until Mother's Day. Free live countdown timer, updated every seco…How Many Days Until Easter?CountdownsSee exactly how many days, hours and minutes until Easter. Free live countdown timer, updated every second — n…How Many Days Until Christmas Eve?CountdownsSee exactly how many days, hours and minutes until Christmas Eve. Free live countdown timer, updated every sec…How Many Days Until St Patrick's Day?CountdownsSee exactly how many days, hours and minutes until St Patrick's Day. Free live countdown timer, updated every …How Many Days Until Boxing Day?CountdownsSee exactly how many days, hours and minutes until Boxing Day. Free live countdown timer, updated every second…How Many Days Until Father's Day?CountdownsSee exactly how many days, hours and minutes until Father's Day. Free live countdown timer, updated every seco…How Many Days Until New Year's Eve?CountdownsSee exactly how many days, hours and minutes until New Year's Eve. Free live countdown timer, updated every se…How Many Days Until Earth Day?CountdownsSee exactly how many days, hours and minutes until Earth Day. Free live countdown timer, updated every second …How Many Days Until Cinco de Mayo?CountdownsSee exactly how many days, hours and minutes until Cinco de Mayo. Free live countdown timer, updated every sec…How Many Days Until Canadian Thanksgiving?CountdownsSee exactly how many days, hours and minutes until Canadian Thanksgiving. Free live countdown timer, updated e…How Many Days Until Remembrance Day?CountdownsSee exactly how many days, hours and minutes until Remembrance Day. Free live countdown timer, updated every s…How Many Days Until Summer?CountdownsSee exactly how many days, hours and minutes until Summer. Free live countdown timer, updated every second — n…How Many Days Until Autumn?CountdownsSee exactly how many days, hours and minutes until Autumn. Free live countdown timer, updated every second — n…How Many Days Until Winter?CountdownsSee exactly how many days, hours and minutes until Winter. Free live countdown timer, updated every second — n…How Many Days Until Spring?CountdownsSee exactly how many days, hours and minutes until Spring. Free live countdown timer, updated every second — n…How Many Days Until June?CountdownsSee exactly how many days, hours and minutes until June. Free live countdown timer, updated every second — no …How Many Days Until December?CountdownsSee exactly how many days, hours and minutes until December. Free live countdown timer, updated every second —…How Many Days Until May?CountdownsSee exactly how many days, hours and minutes until May. Free live countdown timer, updated every second — no s…How Many Days Until July?CountdownsSee exactly how many days, hours and minutes until July. Free live countdown timer, updated every second — no …How Many Days Until September?CountdownsSee exactly how many days, hours and minutes until September. Free live countdown timer, updated every second …How Many Days Until January?CountdownsSee exactly how many days, hours and minutes until January. Free live countdown timer, updated every second — …How Many Days Until February?CountdownsSee exactly how many days, hours and minutes until February. Free live countdown timer, updated every second —…How Many Days Until April?CountdownsSee exactly how many days, hours and minutes until April. Free live countdown timer, updated every second — no…How Many Days Until August?CountdownsSee exactly how many days, hours and minutes until August. Free live countdown timer, updated every second — n…How Many Days Until November?CountdownsSee exactly how many days, hours and minutes until November. Free live countdown timer, updated every second —…How Many Days Until March?CountdownsSee exactly how many days, hours and minutes until March. Free live countdown timer, updated every second — no…How Many Days Until October?CountdownsSee exactly how many days, hours and minutes until October. Free live countdown timer, updated every second — …How Many Days Until April Fools' Day?CountdownsSee exactly how many days, hours and minutes until April Fools' Day. Free live countdown timer, updated every …How Many Days Until Labor Day?CountdownsSee exactly how many days, hours and minutes until Labor Day. Free live countdown timer, updated every second …How Many Days Until Tax Day?CountdownsLive countdown to Tax Day - April 15. Track the filing deadline for federal taxes, extensions and quarterly es…How Many Days Until Friday?CountdownsLive countdown to the next Friday - updates every second and rolls over automatically every week. The weekend …How Many Days Until the Weekend?CountdownsLive countdown to the weekend - Saturday, 00:00, updating every second and rolling over every week. The tab ti…Online TimerCountdownsFree online countdown timer with presets (1-60 min), tab-title live countdown and a three-beep alarm at zero. …StopwatchCountdownsFree online stopwatch with lap splits, 10ms precision and a live tab-title display. Keeps running through relo…Pomodoro TimerCountdownsFree online pomodoro timer: 25/5 focus cycles, long break every fourth round, live tab-title countdown and a d…
Calculators 131
Instant answers for the everyday math people actually search for — percentages, dates, tips and discounts.
Inch Fraction CalculatorCalculatorsConvert fractional inches (like 3/8 or 1-3/4) to decimal inches and millimeters — and back. Rounded to the nea…Percentage Increase CalculatorCalculatorsCalculate percentage increase (or decrease) between two numbers instantly: salary raises, price changes, growt…Average CalculatorCalculatorsPaste a list of numbers and get the average (mean), plus sum and count. Handles comma, space or line-separated…Percentage CalculatorCalculatorsCalculate X% of a number, what percent X is of Y, and percentage increase or decrease. Free instant percentage…Days Between Two DatesCalculatorsFree calculator for the number of days between two dates. Shows weeks, weekdays (business days) and total hour…Age CalculatorCalculatorsCalculate your exact age in years, months and days from your date of birth. Also shows days lived and a countd…Tip Calculator & Bill SplitterCalculatorsCalculate the tip and split the bill between friends in seconds. Preset percentages, round-up options and per-…Percent Off CalculatorCalculatorsWork out the sale price after any discount, see exactly how much you save, and compare stacked discounts. Inst…Reading Time CalculatorCalculatorsPaste any text and see how long it takes to read or speak. Uses the standard 225 words-per-minute reading spee…Typing Speed TestCalculatorsTake a free 60-second typing test and get your WPM and accuracy instantly. No sign-up, works on desktop and mo…Words to Pages ConverterCalculatorsConvert word counts to page estimates for essays and reports: 250 words per page single-spaced, 500 double-spa…Sales Tax CalculatorCalculatorsAdd sales tax to a price, or remove tax to find the pre-tax amount. Two-direction calculator for US shoppers, …Grade CalculatorCalculatorsTurn any test score into a percentage and letter grade instantly. Enter points earned and points possible — se…Hours CalculatorCalculatorsCalculate hours and minutes between a start and end time — handles overnight shifts and gives decimal hours fo…Aspect Ratio CalculatorCalculatorsCalculate missing dimensions while keeping the aspect ratio. Presets for 16:9, 4:3, 1:1, 21:9 and more. Perfec…Day of the Week CalculatorCalculatorsFind the day of the week for any date in history — birthdays, historical events, or the date of your next anni…Salary to Hourly CalculatorCalculatorsConvert your annual salary to an hourly wage (and back). Uses the standard 2,080-hour work year, with custom h…Square Footage CalculatorCalculatorsCalculate square footage (or square meters) from length and width. Works in feet or meters, converts between t…Pixels to Inches CalculatorCalculatorsConvert pixels to inches for print or screen: enter pixel dimensions and DPI/PPI to get exact physical size. I…Half CalculatorCalculatorsWhat is half of 3/4 cup, half of 150, or half of 2-1/2? Split any number, fraction or mixed amount in half — e…Cubic Feet CalculatorCalculatorsCalculate cubic feet from length, width and height — for moving trucks, storage units, fridges and shipping. W…Unit Price CalculatorCalculatorsCompare two packs by unit price: price ÷ quantity for A and B, winner highlighted. Works with any unit — per 1…Degrees to Radians ConverterCalculatorsConvert degrees to radians and back instantly: 180° = π rad. Exact π forms for common angles plus decimal valu…Prime Number CheckerCalculatorsCheck if any number is prime instantly, with the first factor shown when it is not. Handles numbers up to 15 d…Factorial CalculatorCalculatorsCalculate n! for any n up to 1,000 with full precision — every digit, not scientific notation. Shows the multi…Your Age on Other PlanetsCalculatorsEnter your Earth age and see how old you would be on Mercury, Venus, Mars, Jupiter and the rest — each planet'…Volume of a Cylinder CalculatorCalculatorsCalculate cylinder volume from radius and height: V = pi x r2 x h. Results in cubic units and liters/gallons f…Business Days CalculatorCalculatorsCount working days (Monday-Friday) between two dates instantly, with weekend days shown separately. For deadli…Speed, Distance & Time CalculatorCalculatorsEnter any two of speed, distance or time and get the third - in km/h, mph, or your own units. With h:mm:ss out…Weight on the MoonCalculatorsEnter your Earth weight and see what you would weigh on the Moon (x0.165), Mars, Jupiter and every planet. Sam…Kelvin ConverterCalculatorsConvert Kelvin to Celsius and Fahrenheit in one view - type in any of the three scales and the others update l…Savings Goal CalculatorCalculatorsEnter a savings goal, what you have saved and your monthly deposit — get the exact month and year you'll reach…Compound Interest CalculatorCalculatorsSee what your money grows to with monthly compounding — starting amount, optional monthly contributions, a yea…Double Discount CalculatorCalculatorsTwo discounts in a row? Enter both and get the true combined percentage, the final price, and a verdict agains…Simple Interest CalculatorCalculatorsCalculate simple interest instantly: interest earned, monthly interest, total at maturity — plus what the same…GPA CalculatorCalculatorsEnter courses, credits and letter grades — get your semester GPA on the 4.0 scale, or fold in prior credits fo…Sleep Cycle CalculatorCalculatorsWaking mid-cycle is why mornings feel brutal. See the best wake-up times if you sleep now — or the bedtime tha…Final Grade CalculatorCalculatorsEnter your current grade and the final's weight — see exactly what score you need for your target course grade…Water Intake CalculatorCalculatorsHow much water should you drink a day? Get a personalized daily target from your body weight, today's exercise…TDEE & Calorie CalculatorCalculatorsFind your total daily energy expenditure: BMR from the Mifflin-St Jeor equation times your real activity level…Tip Split CalculatorCalculatorsSplit the dinner bill fairly: bill + tip ÷ people, each person's exact share, and a round-up option that fatte…Heat Index CalculatorCalculatorsEnter temperature and humidity to get the heat index — what your body actually feels in the shade — with the o…BMI CalculatorCalculatorsCalculate your Body Mass Index in metric or imperial units — with the WHO category and the healthy weight rang…Wind Chill CalculatorCalculatorsEnter temperature and wind speed to get the wind chill — how cold exposed skin actually feels — plus official …Running Pace CalculatorCalculatorsEnter a distance and finish time to get your running pace per kilometer and per mile, your speed, and predicte…Macro CalculatorCalculatorsTurn a daily calorie target into grams of protein, carbs and fat — with four goal presets and full custom cont…Electricity Cost CalculatorCalculatorsEnter an appliance's watts, hours used per day and your rate per kWh — get the daily, monthly and yearly runni…Body Fat CalculatorCalculatorsEstimate body fat percentage with the US Navy tape method — just height, neck and waist (plus hip for women), …Oven Temperature ConverterCalculatorsConvert any oven setting between Fahrenheit, Celsius and UK gas marks — plus a full reference table from merin…CGPA to Percentage CalculatorCalculatorsConvert CGPA to percentage (×9.5, the CBSE formula) or percentage back to CGPA — with typical class bands and …Caffeine CalculatorCalculatorsCount your day's caffeine from coffee, tea, cola and energy drinks — see the total against the 400 mg adult gu…GST CalculatorCalculatorsAdd 5/12/18/28% GST to a net price, or extract it from a GST-inclusive price — with CGST/SGST split for intra-…Overtime Pay CalculatorCalculatorsEnter your hourly rate and weekly hours — see regular pay, overtime pay at 1.5× past 40, and the exact dollar …Rent Affordability CalculatorCalculatorsEnter your income and monthly debts — get the maximum rent by the 30% rule, adjusted for a 36% debt-to-income …Fuel Cost CalculatorCalculatorsEnter trip distance, your car's consumption and local fuel price — get the one-way cost, round trip and per-pe…Commission CalculatorCalculatorsEnter base pay, commission rate and revenue — see the total paycheck, quota attainment and how much of your pa…Air Fryer ConverterCalculatorsTurn any oven recipe into an air fryer setting: about 25°F (15°C) cooler and 20% faster, with a check-early wa…Loan Payment CalculatorCalculatorsEnter amount, rate and term to see the amortized monthly payment, total interest and what share of every payme…VAT CalculatorCalculatorsAdd VAT to a net price or strip it from a gross price — UK 20%, Germany 19%, Ireland 23% and more, with the di…Fraction CalculatorCalculatorsAdd, subtract, multiply or divide two fractions — exact simplified answer with mixed number, decimal and the c…Pregnancy Due Date CalculatorCalculatorsEstimate your due date from your last period, conception date or an ultrasound reading — plus gestational age …Week Number CalculatorCalculatorsFind the ISO-8601 week number for any date - with Monday-Sunday boundaries, quarter and day of year, and the f…Time Card CalculatorCalculatorsAdd up a full week of clock-ins and clock-outs - lunch deducted, overnight shifts handled, overtime over 40 ho…One Rep Max CalculatorCalculatorsEstimate your one rep max from any set - Epley, Brzycki and Lander formulas averaged, with percentage working …Standard Deviation CalculatorCalculatorsPaste any dataset to get sample and population standard deviation, variance, mean, n and range - with the n-1 …Concrete CalculatorCalculatorsEnter slab length, width and thickness to get cubic yards for the ready-mix order plus 80 lb and 60 lb bag cou…Slope CalculatorCalculatorsFind the slope between two points - decimal and exact fraction, inclination angle, y-intercept and the perpend…Paint CalculatorCalculatorsWork out gallons or liters for any room - wall area minus doors and windows, coats included, with the buy-extr…Tile CalculatorCalculatorsEnter area and tile size to get the tile count, boxes to buy and the 10% cutting waste already included. Works…Half Birthday CalculatorCalculatorsFind your half birthday - the six-month mirror of your birth date - with the exact date, days until it, and yo…Ratio CalculatorCalculatorsSolve the missing value in any proportion - A is to B as C is to what? - with the simplified ratio, decimal an…Calories Burned CalculatorCalculatorsEstimate calories burned for walking, running, swimming, HIIT and more - MET values by activity, your body wei…Debt Payoff CalculatorCalculatorsSee exactly when a balance dies: months to debt-free, total interest, the minimum-payment trap - and what payi…Amortization ScheduleCalculatorsSee every payment's interest/principal split and running balance - first year in full, anniversaries after, wi…Stock Average Down CalculatorCalculatorsAdd shares at a new price and see your blended average cost, total invested and how far the break-even bar mov…Position Size CalculatorCalculatorsEnter account size, risk %, entry and stop to get your exact position size, stop distance, position value and …Lottery Odds CalculatorCalculatorsExact jackpot odds for Powerball, Mega Millions and EuroMillions, plus expected value per ticket and the jackp…Password Strength CheckerCalculatorsTest a password's entropy and realistic crack times against online, GPU and datacenter attacks - computed loca…Crypto Profit CalculatorCalculatorsCalculate real crypto profit after exchange fees on both sides: net P/L, ROI, total invested and the exact bre…Dog Age CalculatorCalculatorsConvert your dog's age to human years with the size-aware veterinary table - and see why the ×7 rule fails. Fr…Cat Age CalculatorCalculatorsConvert your cat's age to human years with the veterinary table, plus life stage and lifespan context. Free, i…Dew Point CalculatorCalculatorsTurn temperature and relative humidity into dew point with a comfort verdict - the honest 'it's not the heat' …BTU CalculatorCalculatorsSize your air conditioner properly: room area, ceiling, insulation, sun, people and kitchen adjustments give B…Tire Size ComparisonCalculatorsCompare two tire sizes before you buy: diameter change, speedometer error at 100 km/h, revs per mile and a ±3%…Heart Rate Zones CalculatorCalculatorsGet your five training heart rate zones from age and resting HR - Karvonen reserve method or classic % of max,…Golf Handicap CalculatorCalculatorsTurn a scorecard into a World Handicap System differential, then into a course handicap for the next tee. Free…BPM Delay CalculatorCalculatorsConvert any tempo into delay and reverb times: 1/4 note, dotted 1/8, triplets, bar length and LFO Hz - the pro…EV Charging Cost CalculatorCalculatorsWork out what your EV really costs per mile or km: battery, efficiency and your electricity rate - with an hon…Golden Hour CalculatorCalculatorsFind today's golden hour windows from any location: sunrise, morning light, evening light and sunset - compute…Pizza Dough CalculatorCalculatorsScale pizza dough precisely: choose ball count, weight and hydration, get flour, water, salt and yeast in gram…Inflation CalculatorCalculatorsConvert money across any years 1913-2025 with BLS CPI-U data: today's buying power, cumulative inflation and a…Sleep Debt CalculatorCalculatorsAdd up the hours you owe your body: average sleep vs your target, debt level, and how many nights of catch-up …Coffee Ratio CalculatorCalculatorsStop guessing your brew: convert water to coffee grams (or back) at any ratio, with strength guidance for pour…Break-Even CalculatorCalculatorsFind the exact number of sales that covers your monthly costs: fixed costs, price and unit cost in, break-even…Ideal Weight CalculatorCalculatorsGet two honest answers for your height: the classic Devine formula and the wider healthy-BMI weight band, in k…CAGR CalculatorCalculatorsSmooth any investment's journey into one honest yearly rate: beginning value, ending value, years - CAGR, tota…Pool Volume CalculatorCalculatorsCalculate your pool's water volume from shape and dimensions - liters, US gallons and tonnes, with average-dep…Time Spent CalculatorCalculatorsTurn 'just an hour a day' into years of your life: daily hours, ages, and the total in years, months and 40-ho…Meat Cooking Time CalculatorCalculatorsRoast times for chicken, turkey, pork, beef and lamb by weight - with safe core temperatures and resting time …Car Depreciation CalculatorCalculatorsSee a car's real cost curve: value after N years at your depreciation rate, total loss, and the per-year cost …Jet Lag CalculatorCalculatorsEstimate how many days jet lag will last for your flight: zones crossed, east or west, plus the pre-shift and …Mulch CalculatorCalculatorsHow many bags of mulch for your beds? Enter area and depth in cm, get bag count, cubic metres and cost. Includ…Laminate Flooring CalculatorCalculatorsHow many packs of laminate for your room? Area plus a waste allowance for cuts, L-shapes and herringbone, with…Wallpaper CalculatorCalculatorsHow many rolls of wallpaper for your room? Perimeter and height with roll size and pattern repeat handled hone…Diaper Cost CalculatorCalculatorsWhat diapers really cost: per day, per month and over the whole diapering years, with the cloth crossover pric…Wake Window CalculatorCalculatorsTypical wake windows by age in months: how long a baby can stay up between naps, nap counts and total daily sl…Formula Feeding CalculatorCalculatorsHow much formula per feed? Enter baby weight and feeds per day for ml per feed using the 150 ml/kg/day rule, w…Protein Intake CalculatorCalculatorsHow much protein do you need? Grams per day by bodyweight and goal — cutting, building, active or 60+ — with r…Creatine CalculatorCalculatorsCreatine dose by bodyweight: loading week vs maintenance-only, grams per day, how long a 500 g tub lasts, and …Data Usage CalculatorCalculatorsHow much data do you actually use? Streaming quality, music, video calls and browsing hours turned into GB per…Flight Delay Compensation CalculatorCalculatorsWhat your delayed flight is worth: EU261/UK261 fixed compensation by distance and arrival delay, plus care and…Subscription Cost CalculatorCalculatorsAdd up what your subscriptions really cost per year: four lines with monthly, quarterly or yearly billing, big…Silver Value CalculatorCalculatorsWhat is my silver worth? Weight, purity (999/925/800) and current spot price give the melt value, per-gram fig…Yarn Yardage CalculatorCalculatorsHow much yarn does your project need? Swatch area and yarn used scaled to project size, with skein count, 15% …Knitting Cast-On CalculatorCalculatorsHow many stitches to cast on for a hat: head circumference, your blocked gauge, negative ease and the pattern …Curtain Fabric CalculatorCalculatorsHow much fabric for curtains? Track width, finished drop, fullness ratio and roll width give panels, cut lengt…Commute Cost CalculatorCalculatorsWhat does your commute really cost? Car all-in per km versus transit pass, per year and per day, with the fuel…Mileage Reimbursement CalculatorCalculatorsTotal mileage reimbursement: distance times rate, in miles or km, with the gap versus your true cost per km an…Carpool Savings CalculatorCalculatorsWhat carpooling actually saves: shared driving cost per person per year, CO₂ taken off the road, and the sched…E-Bike Range CalculatorCalculatorsReal e-bike range, not brochure range: battery Wh divided by honest Wh/km for your assist level, with cold-wea…Bike Saddle Height CalculatorCalculatorsCorrect saddle height from your inseam: LeMond factor for road, comfort and MTB variants, plus the knee-pain d…E-Bike Charging Cost CalculatorCalculatorsWhat an e-bike really costs to run: charge cost from battery Wh and your electricity price, per 100 km and per…TV Size CalculatorCalculatorsWhat size TV for your room? Sofa distance and resolution give the right diagonal in inches, with screen width …Fish Tank Stocking CalculatorCalculatorsHow many fish for your tank? Litres and adult fish size with community, cichlid and goldfish stocking rules, p…Laundry Detergent CalculatorCalculatorsHow much detergent per wash? Load size, soil level and water hardness give the right liquid or powder dose - a…Moving Cost CalculatorCalculatorsWhat should your move cost? Professional crew vs DIY van with fuel, pizza wages and boxes - with the access tr…Moving Boxes CalculatorCalculatorsHow many moving boxes do you need? Bedrooms and packing style give the box count, size mix, tape and bubble wr…Moving Timeline PlannerCalculatorsEnter your moving date and get the week-by-week plan: when to book movers, declutter, change addresses and pac…Heating Cost CalculatorCalculatorsWhat will this winter cost? Home area, insulation and heating system give the season bill, monthly figure and …Radiator Size CalculatorCalculatorsWhat size radiator does the room need? Area, ceiling height, insulation and window extras give watts, BTU/h an…Insulation Payback CalculatorCalculatorsWhich insulation upgrade pays back first? Draft-proofing, loft, walls or windows - annual saving, payback year…
Converters 101
Two-way unit conversions with the exact formulas and reference tables — length, weight, temperature and distance.
centimeters to inches ConverterConvertersConvert centimeters to inches instantly. Exact formula, quick reference table, and a free two-way converter — …inches to centimeters ConverterConvertersConvert inches to centimeters instantly. Exact formula, quick reference table, and a free two-way converter — …kilograms to pounds ConverterConvertersConvert kilograms to pounds instantly. Exact formula, quick reference table, and a free two-way converter — no…pounds to kilograms ConverterConvertersConvert pounds to kilograms instantly. Exact formula, quick reference table, and a free two-way converter — no…Celsius to Fahrenheit ConverterConvertersConvert Celsius to Fahrenheit instantly. Exact formula, quick reference table, and a free two-way converter — …Fahrenheit to Celsius ConverterConvertersConvert Fahrenheit to Celsius instantly. Exact formula, quick reference table, and a free two-way converter — …miles to kilometers ConverterConvertersConvert miles to kilometers instantly. Exact formula, quick reference table, and a free two-way converter — no…kilometers to miles ConverterConvertersConvert kilometers to miles instantly. Exact formula, quick reference table, and a free two-way converter — no…millimeters to inches ConverterConvertersConvert millimeters to inches instantly. Exact formula, quick reference table, and a free two-way converter — …meters to feet ConverterConvertersConvert meters to feet instantly. Exact formula, quick reference table, and a free two-way converter — no ads …feet to meters ConverterConvertersConvert feet to meters instantly. Exact formula, quick reference table, and a free two-way converter — no ads …ounces to grams ConverterConvertersConvert ounces to grams instantly. Exact formula, quick reference table, and a free two-way converter — no ads…grams to ounces ConverterConvertersConvert grams to ounces instantly. Exact formula, quick reference table, and a free two-way converter — no ads…liters to gallons (US) ConverterConvertersConvert liters to gallons (US) instantly. Exact formula, quick reference table, and a free two-way converter —…gallons (US) to liters ConverterConvertersConvert gallons (US) to liters instantly. Exact formula, quick reference table, and a free two-way converter —…square feet to square meters ConverterConvertersConvert square feet to square meters instantly. Exact formula, quick reference table, and a free two-way conve…square meters to square feet ConverterConvertersConvert square meters to square feet instantly. Exact formula, quick reference table, and a free two-way conve…stone to kilograms ConverterConvertersConvert stone to kilograms instantly. Exact formula, quick reference table, and a free two-way converter — no …kilograms to stone ConverterConvertersConvert kilograms to stone instantly. Exact formula, quick reference table, and a free two-way converter — no …milliliters to fluid ounces (US) ConverterConvertersConvert milliliters to fluid ounces (US) instantly. Exact formula, quick reference table, and a free two-way c…minutes to hours ConverterConvertersConvert minutes to hours instantly. Exact formula, quick reference table, and a free two-way converter — no ad…inches to feet ConverterConvertersConvert inches to feet instantly. Exact formula, quick reference table, and a free two-way converter — no ads …kilometers per hour to miles per hour ConverterConvertersConvert kilometers per hour to miles per hour instantly. Exact formula, quick reference table, and a free two-…miles per hour to kilometers per hour ConverterConvertersConvert miles per hour to kilometers per hour instantly. Exact formula, quick reference table, and a free two-…cups (US) to milliliters ConverterConvertersConvert cups (US) to milliliters instantly. Exact formula, quick reference table, and a free two-way converter…tablespoons to teaspoons ConverterConvertersConvert tablespoons to teaspoons instantly. Exact formula, quick reference table, and a free two-way converter…fluid ounces to cups (US) ConverterConvertersConvert fluid ounces to cups (US) instantly. Exact formula, quick reference table, and a free two-way converte…liters to pints (US) ConverterConvertersConvert liters to pints (US) instantly. Exact formula, quick reference table, and a free two-way converter — n…kilograms to stone ConverterConvertersConvert kilograms to stone instantly. Exact formula, quick reference table, and a free two-way converter — no …tablespoons to cups (US) ConverterConvertersConvert tablespoons to cups (US) instantly. Exact formula, quick reference table, and a free two-way converter…quarts (US) to liters ConverterConvertersConvert quarts (US) to liters instantly. Exact formula, quick reference table, and a free two-way converter — …quarts (US) to gallons (US) ConverterConvertersConvert quarts (US) to gallons (US) instantly. Exact formula, quick reference table, and a free two-way conver…liters to quarts (US) ConverterConvertersConvert liters to quarts (US) instantly. Exact formula, quick reference table, and a free two-way converter — …gallons (US) to pints (US) ConverterConvertersConvert gallons (US) to pints (US) instantly. Exact formula, quick reference table, and a free two-way convert…pounds to ounces ConverterConvertersConvert pounds to ounces instantly. Exact formula, quick reference table, and a free two-way converter — no ad…grams to pounds ConverterConvertersConvert grams to pounds instantly. Exact formula, quick reference table, and a free two-way converter — no ads…stone to pounds ConverterConvertersConvert stone to pounds instantly. Exact formula, quick reference table, and a free two-way converter — no ads…milliliters to liters ConverterConvertersConvert milliliters to liters instantly. Exact formula, quick reference table, and a free two-way converter — …cups (US) to fluid ounces ConverterConvertersConvert cups (US) to fluid ounces instantly. Exact formula, quick reference table, and a free two-way converte…yards to meters ConverterConvertersConvert yards to meters instantly. Exact formula, quick reference table, and a free two-way converter — no ads…pints (US) to liters ConverterConvertersConvert pints (US) to liters instantly. Exact formula, quick reference table, and a free two-way converter — n…inches to millimeters ConverterConvertersConvert inches to millimeters instantly. Exact formula, quick reference table, and a free two-way converter — …feet to centimeters ConverterConvertersConvert feet to centimeters instantly. Exact formula, quick reference table, and a free two-way converter — no…Roman Numerals ConverterConvertersConvert numbers to Roman numerals and back instantly: 2026 = MMXXVI. Full 1–3999 range, bidirectional, with th…liters to milliliters ConverterConvertersConvert liters to milliliters instantly. Exact formula, quick reference table, and a free two-way converter — …Text to Binary ConverterConvertersConvert text to binary code and binary back to text instantly. Every character becomes 8 bits (UTF-8). Great f…Grams to Cups ConverterConvertersConvert grams to cups by ingredient: flour, sugar, butter, oats, cocoa and more. Ingredient density matters — …liters to quarts (US) ConverterConvertersConvert liters to quarts (US) instantly. Exact formula, quick reference table, and a free two-way converter — …L/100km to MPG CalculatorConvertersConvert liters per 100 km to US MPG (and back). The two fuel-economy scales run in opposite directions — this …Cups to Grams ConverterConvertersConvert cups to grams by ingredient: flour 125 g/cup, sugar 200 g, butter 227 g and more. The accurate way to …Seconds ConverterConvertersConvert a raw number of seconds into hours, minutes and seconds (h:m:s) — perfect for video lengths, run times…gigabytes to megabytes ConverterConvertersConvert gigabytes to megabytes instantly. Exact formula, quick reference table, and a free two-way converter —…megabytes to gigabytes ConverterConvertersConvert megabytes to gigabytes instantly. Exact formula, quick reference table, and a free two-way converter —…fluid ounces (US) to milliliters ConverterConvertersConvert fluid ounces (US) to milliliters instantly. Exact formula, quick reference table, and a free two-way c…Roman Numeral Date ConverterConvertersConvert any date into Roman numerals — the classic wedding date and tattoo format (like XII·XXV·MMXXIV). 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The two-unit height Ameri…Centimeters to Feet and InchesConvertersConvert centimeters to feet and inches in one step — 170 cm is 5 ft 6.9 in. Exact splits for medical forms, da…cubic meters to liters ConverterConvertersConvert cubic meters to liters instantly. Exact formula, quick reference table, and a free two-way converter —…Hex to RGB ConverterConvertersConvert HEX color codes to RGB and back instantly, with a live color preview. For designers, front-end develop…gallons (US) to quarts (US) ConverterConvertersConvert gallons (US) to quarts (US) instantly. Exact formula, quick reference table, and a free two-way conver…kilobytes to gigabytes ConverterConvertersConvert kilobytes to gigabytes instantly. Exact formula, quick reference table, and a free two-way converter —…kilometers to feet ConverterConvertersConvert kilometers to feet instantly. Exact formula, quick reference table, and a free two-way converter — no …miles to feet ConverterConvertersConvert miles to feet instantly. 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Exact formula, quick reference table, and a free two-way converter — no…fluid ounces to tablespoons ConverterConvertersConvert fluid ounces to tablespoons instantly. Exact formula, quick reference table, and a free two-way conver…quarts (US) to pints (US) ConverterConvertersConvert quarts (US) to pints (US) instantly. Exact formula, quick reference table, and a free two-way converte…cups (US) to quarts (US) ConverterConvertersConvert cups (US) to quarts (US) instantly. Exact formula, quick reference table, and a free two-way converter…gigabytes to kilobytes ConverterConvertersConvert gigabytes to kilobytes instantly. Exact formula, quick reference table, and a free two-way converter —…liters to cups (US) ConverterConvertersConvert liters to cups (US) instantly. Exact formula, quick reference table, and a free two-way converter — no…cups (US) to pints (US) ConverterConvertersConvert cups (US) to pints (US) instantly. Exact formula, quick reference table, and a free two-way converter …pints (US) to cups (US) ConverterConvertersConvert pints (US) to cups (US) instantly. Exact formula, quick reference table, and a free two-way converter …centimeters to feet ConverterConvertersConvert centimeters to feet instantly. Exact formula, quick reference table, and a free two-way converter — no…meters to inches ConverterConvertersConvert meters to inches instantly. Exact formula, quick reference table, and a free two-way converter — no ad…yards to inches ConverterConvertersConvert yards to inches instantly. Exact formula, quick reference table, and a free two-way converter — no ads…grams to kilograms ConverterConvertersConvert grams to kilograms instantly. Exact formula, quick reference table, and a free two-way converter — no …kilograms to ounces ConverterConvertersConvert kilograms to ounces instantly. Exact formula, quick reference table, and a free two-way converter — no…ounces to kilograms ConverterConvertersConvert ounces to kilograms instantly. Exact formula, quick reference table, and a free two-way converter — no…Text to Morse Code ConverterConvertersConvert text to Morse code and back instantly. Standard International Morse with letters, numbers and punctuat…feet to yards ConverterConvertersConvert feet to yards instantly. Exact formula, quick reference table, and a free two-way converter — no ads w…Epoch Timestamp ConverterConvertersConvert Unix epoch timestamps to human dates and back, live. Shows the current timestamp ticking, accepts seco…inches to yards ConverterConvertersConvert inches to yards instantly. Exact formula, quick reference table, and a free two-way converter — no ads…miles to meters ConverterConvertersConvert miles to meters instantly. Exact formula, quick reference table, and a free two-way converter — no ads…kilometers to yards ConverterConvertersConvert kilometers to yards instantly. Exact formula, quick reference table, and a free two-way converter — no…minutes to days ConverterConvertersConvert minutes to days instantly. Exact formula, quick reference table, and a free two-way converter — no ads…kilometers to inches ConverterConvertersConvert kilometers to inches instantly. Exact formula, quick reference table, and a free two-way converter — n…inches to kilometers ConverterConvertersConvert inches to kilometers instantly. Exact formula, quick reference table, and a free two-way converter — n…hours to days ConverterConvertersConvert hours to days instantly. Exact formula, quick reference table, and a free two-way converter — no ads w…Words to Number ConverterConvertersConvert English number words to digits: 'two thousand three hundred forty-two' becomes 2,342. Handles negative…Binary to Decimal ConverterConvertersConvert binary to decimal and decimal to binary instantly. Positional values explained (128 64 32 16 8 4 2 1),…tablespoons to milliliters ConverterConvertersConvert tablespoons to milliliters instantly. Exact formula, quick reference table, and a free two-way convert…Time Zone ConverterConvertersConvert any date and time between 20+ world zones with daylight saving handled automatically - see the local t…
Text Tools 15
Word counting and case conversion that run entirely in your browser — private by design.
Strip HTML TagsText ToolsRemove HTML tags from any text instantly — convert markup to clean plain text, decode entities, and see how ma…Word CounterText ToolsCount words, characters (with and without spaces), sentences and paragraphs instantly. Live statistics with es…Case ConverterText ToolsConvert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case. One cli…Duplicate Line RemoverText ToolsPaste any list or text and remove duplicate lines instantly — original order preserved. Shows exactly how many…URL Slug GeneratorText ToolsTurn any title into a clean URL slug: lowercase, accents stripped, spaces to hyphens. Perfect for blog posts, …Line SorterText ToolsSort text lines alphabetically A-Z or Z-A instantly. Case-insensitive option, duplicate and blank line cleanup…Word Frequency CounterText ToolsPaste text and see which words appear most often, ranked by count with percentages. Live TOP table, stopwords …Whitespace CleanerText ToolsClean messy text instantly: trim leading and trailing spaces on every line, collapse double spaces, and remove…Reverse Text GeneratorText ToolsReverse text two ways: flip the whole string character-by-character, or reverse word order only. Live output, …JSON FormatterText ToolsFormat, validate and minify JSON in your browser - pretty print with 2-space or tab indent, exact parse-error …Base64 Encode & DecodeText ToolsConvert text to Base64 and back with full UTF-8 support - emoji and non-Latin scripts round-trip perfectly, in…URL Encoder & DecoderText ToolsEncode and decode URLs and query values correctly - component mode for ?q= parameters, full-URL mode that keep…JWT DecoderText ToolsPaste a JWT to read its header and payload as JSON, with alg, claim count and expiry timing - exp, iat and nbf…CSV to JSONText ToolsConvert CSV to a JSON array instantly - headers become keys, quoted commas survive, numbers auto-typed, delimi…Flesch Reading Ease CalculatorText ToolsPaste text and get its Flesch Reading Ease score, grade level, sentence stats and what they mean - computed lo…
Generators 13
Random names and strong passwords, generated locally with cryptographically secure randomness.
Random Name GeneratorGeneratorsGenerate random names for fantasy characters, game teams, babies' name inspiration, or username ideas. Click f…Random Password GeneratorGeneratorsGenerate strong random passwords with one click. Choose length and character sets. Runs entirely in your brows…Random Number GeneratorGeneratorsGenerate random numbers in any range, with or without duplicates. Uses your browser's cryptographic random sou…Upside Down TextGeneratorsFlip your text upside down with real Unicode characters — works in Instagram bios, WhatsApp, TikTok and anywhe…Coin FlipGeneratorsFlip a coin online: cryptographically fair heads or tails with a running tally. Can't decide? Let 256 bits of …Dice RollerGeneratorsRoll virtual dice online: pick how many dice and how many faces (D6, D20, anything). Cryptographically fair re…Random Letter GeneratorGeneratorsGenerate random letters A–Z for classroom games, giveaways and puzzles. Cryptographically fair, no repeats opt…Yes or No?GeneratorsCan't decide? Get a random Yes or No answer instantly. Cryptographically fair 50/50, with a running tally. The…Random Country GeneratorGeneratorsGet a random country with its flag — filter by continent if you like. For geography class, travel dice, quiz n…Random Emoji GeneratorGeneratorsGet random emoji instantly — one at a time or batches, with category filters for faces, animals, food and more…Name CombinerGeneratorsBlend two names into one: couple names, ship names, baby names, team names or brand ideas. Multiple merge styl…Random Team GeneratorGeneratorsPaste a list of names and split them into any number of fair, random teams with one click - crypto-grade shuff…Lorem Ipsum GeneratorGeneratorsGenerate placeholder text with exact paragraph and word counts, optional classic start, one-tap copy. Free, in…
About ToolDune
ToolDune is a collection of small, fast, honest web tools. No accounts, no paywalls, no selling your data — each tool does one job and gets out of your way. Bookmark us and the tide of small annoyances goes out.
Private by architecture
Every tool runs entirely in your browser. The numbers and text you type never reach a server — there is simply nothing to send.
Fast on any device
No frameworks, no bloat, no spinner. Pages are tiny and load instantly, even on a slow mobile connection or an older device.
Free, forever
No accounts, no paywalls, no locked features. Supported by unobtrusive ads — never by selling data or gating the tool you need.