Everyday Calculators

Money, dates, measurements and percentages — quick answers that run entirely in your browser, with the working shown so you can check them.

Percent of a number, what percent one number is of another, and percentage increase or decrease.

Monthly repayment, total interest and a year-by-year amortisation schedule, with extra payments.

Grow a balance with regular deposits at any compounding frequency and watch interest overtake deposits.

Take a percentage off a price, add or strip out sales tax, and check what stacked discounts really cost.

Tip, total and the per-person split, with pre-tax tipping and round-up options.

Exact age in years, months and days, total days lived, and the countdown to the next birthday.

Days between two dates including working days only, or add and subtract time from any date.

Body Mass Index in metric or imperial, with the WHO category and healthy range for your height.

Length, weight, temperature, volume, area, speed, digital storage and time in one place.