Calculators

Quick, accurate calculators for everyday math, finance, and health.

Runs in your browser — nothing uploaded
Percentage CalculatorQuickly calculate any percentage: what is X% of Y, X is what percent of Y, and percentage increase or decrease. Free and private.Loan CalculatorWork out the monthly payment, total interest, and full amortization schedule for any fixed-rate loan. Mortgage, auto, student, personal. Runs in your browser.Age CalculatorFind your exact age in years, months, days, hours, and seconds. See when your next birthday lands and what day of the week you were born.Date Difference CalculatorFind the number of days, weeks, months, and years between any two dates. Add or subtract a number of days to a date. Runs entirely in your browser.BMI CalculatorCalculate your Body Mass Index in metric or imperial units. See where you sit on the WHO scale, with a clear category and a health disclaimer.Tip CalculatorWork out the tip on any bill, split it across the table, and see the per-person total. Quick presets for 10, 15, 18, 20, 25 percent.Discount CalculatorFind the final price and savings on any discount. Reverse-mode works backwards from a sale price to the original. Stacked discounts supported.