Calculators
Everyday calculators that show the formula they use, so you can check the result. Financial and health results are estimates, not professional advice.
11 tools
Tools in this category
- Percentage CalculatorWork out X% of a number, what percent one number is of another, percentage increase or decrease, adding or removing a percent, and reverse percentages.
- Age CalculatorFind your exact age in years, months and days on any date, with totals in months, weeks and days and a countdown to your next birthday and its weekday.
- Date Difference CalculatorCount the days between two dates in years, months and days, total days, weeks and hours, plus Monday–Friday business days. Times and end date optional.
- Date Add / Subtract CalculatorAdd or subtract years, months, weeks, days or business days to any date. Shows the resulting weekday and ISO date and explains month-end rules.
- Unit ConverterConvert length, weight, temperature, area, volume, speed, time, data size, pressure, energy and fuel economy with exact factors. See every unit at once.
- Loan CalculatorWork out the monthly payment, total interest and amortization schedule of a fixed-rate loan, see what extra payments save, and download a CSV.
- Discount CalculatorFind the sale price and the amount saved for any percent off, stack a second discount, add sales tax after the discount, or work back to the original price.
- VAT CalculatorAdd VAT or sales tax to a net price, or extract it from a gross price. Enter any rate and get net, tax and gross amounts rounded to the cent.
- Compound Interest CalculatorSee how savings grow with compound interest: pick the compounding frequency, add monthly deposits, and get the final balance and a year-by-year table.
- BMI CalculatorCalculate body mass index from height and weight in kg/cm or lb/ft/in, see the WHO adult category and the weight range that gives a BMI of 18.5 to 24.9.
- Random Number GeneratorGenerate fair random numbers in any range, with or without repeats, pick random items from a list, flip a coin or roll dice, all with secure randomness.