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Free calculators and unit converters for everyday maths
70 calculators and converters that work in your browser. Share a result by copying the page address.
- Free
- No sign-up
- Shareable results
Calculators 14 tools
- Percentage calculatorPopularThree percentage questions on one page, answered as you type.
- Age calculatorPopularExact age in years, months and days, with a countdown to the next birthday.
- Date difference calculatorDays, weeks, months and working days between any two dates.
- Add days to dateFind the date that is a number of days, weeks, months or years away.
- Time zone converterConvert one moment into the local time of several cities, daylight saving included.
- EMI calculatorPopularMonthly EMI, total interest and a month-by-month schedule for any loan.
- SIP calculatorSee what a monthly investment could grow to, with or without a yearly step-up.
- GST calculatorAdd or remove GST and see the CGST, SGST and IGST amounts.
- Compound interest calculatorFuture value of a deposit with compounding and optional monthly additions.
- Discount calculatorSale price, savings and the true effect of stacked discounts.
- BMI calculatorBody mass index and the healthy weight range for your height.
- Aspect ratio calculatorSimplify a size to its ratio, or resize without distorting.
- Random number generatorFair random numbers from your browser, with no repeats if you want.
- Random name pickerPaste a list, press Pick and get a fair random winner.
Unit converters 7 tools
- Length converterPopularConvert any length unit to any other, with every unit shown at once.
- Weight converterConvert kilograms, pounds, ounces, stone and more in one place.
- Temperature converterSwitch between Celsius, Fahrenheit and Kelvin with the formula shown.
- Data size converterDecimal and binary data units side by side, so the numbers finally add up.
- Area converterConvert floor areas and land sizes between metric and imperial units.
- Volume converterCooking and fuel volumes in one converter, with US and UK units kept apart.
- Speed converterRoad, wind and marine speeds converted instantly.
Popular conversions 38 tools
- kg to lbsType a number and get pounds straight away.
- lbs to kgType a number and get kilograms straight away.
- cm to inchesType a number and get inches straight away.
- inches to cmType a number and get centimeters straight away.
- feet to metersType a number and get meters straight away.
- meters to feetType a number and get feet straight away.
- miles to kmType a number and get kilometers straight away.
- km to milesType a number and get miles straight away.
- Celsius to FahrenheitType a number and get degrees Fahrenheit straight away.
- Fahrenheit to CelsiusType a number and get degrees Celsius straight away.
- MB to GBType a number and get gigabytes straight away.
- GB to MBType a number and get megabytes straight away.
- TB to GBType a number and get gigabytes straight away.
- GB to TBType a number and get terabytes straight away.
- oz to gramsType a number and get grams straight away.
- grams to ozType a number and get ounces straight away.
- liters to gallonsType a number and get US gallons straight away.
- gallons to litersType a number and get liters straight away.
- ml to ozType a number and get US fluid ounces straight away.
- oz to mlType a number and get milliliters straight away.
- mph to km/hType a number and get kilometers per hour straight away.
- km/h to mphType a number and get miles per hour straight away.
- sq ft to sq mType a number and get square meters straight away.
- sq m to sq ftType a number and get square feet straight away.
- acres to hectaresType a number and get hectares straight away.
- hectares to acresType a number and get acres straight away.
- stones to kgType a number and get kilograms straight away.
- kg to stonesType a number and get stone straight away.
- inches to mmType a number and get millimeters straight away.
- mm to inchesType a number and get inches straight away.
- yards to metersType a number and get meters straight away.
- meters to yardsType a number and get yards straight away.
- cups to mlType a number and get milliliters straight away.
- ml to cupsType a number and get US cups straight away.
- hours to minutesType a number and get minutes straight away.
- minutes to hoursType a number and get hours straight away.
- days to hoursType a number and get hours straight away.
- hours to daysType a number and get days straight away.
Calculator scenarios 11 tools
- Home loan EMI calculatorMonthly EMI and lifetime interest for a long home loan, with a month-by-month schedule.
- Car loan EMI calculatorSee what a car loan really costs each month and over the full term.
- Personal loan EMI calculatorShort-term loans cost more per year.
- Percentage increase calculatorEnter the old and new value to see how many percent it went up.
- Percentage decrease calculatorEnter the old and new value to see how many percent it dropped.
- GST calculator 18 percentFixed at 18 percent: type a price, get the GST, CGST and SGST.
- SIP calculator for 10 yearsA ten-year horizon, fixed: choose a monthly amount and an expected return.
- Monthly compound interest calculatorInterest added twelve times a year, fixed: set the amount, rate and years.
- Age in days calculatorEnter a birth date to see your age counted in days, weeks and months.
- BMI calculator for womenThe same adult BMI ranges apply to women and men.
- Shopping discount calculatorA sale plus a coupon is not the two percentages added together.
No tool matches that search.
Which Calculators tool do I need?
Find the right tool by what you’re trying to do.
| I want to… | Use |
|---|---|
| Work out a percentage | Percentage calculator |
| Plan a loan payment | EMI calculator |
| See how savings grow | SIP calculator or Compound interest calculator |
| Add or remove GST | GST calculator |
| Find the days between dates | Date difference calculator |
| Convert units | Length converter or Weight converter |
Calculators questions
Privacy, limits and file sizes.
Are the financial calculators accurate?
They use standard formulas, but results are estimates only. They are not financial advice.
Can I share a result?
Yes. The page address holds your inputs, so copying it shares the same numbers.
Are my numbers stored?
No. Calculations run in your browser and nothing is sent to a server.
Which units can I convert?
Length, weight, temperature, data size, area, volume and speed, plus many popular pairs like kg to lbs.