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Simple calculators for everyday life

A small, thoughtful toolkit for the numbers you actually need — finance, dates, daily costs, environment and math.

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53 utilities

Equated monthly installments for any loan.

Future value of a systematic investment plan.

Your exact age in years, months and days.

Percent of, increase, decrease.

Body mass index from height & weight.

Daily calorie needs via Mifflin–St Jeor.

Live clocks for cities around the world.

Convert times across cities and plan meetings.

Length, weight, temperature, cooking & more.

Live exchange rates with offline caching.

International clothing, shoe & bra sizes across 17 countries.

Secure passwords with strength & entropy.