Math Tools

Calculate your exact age in years, months, days, and discover fun birth facts.

A full-featured calculator for basic and scientific calculations.

Convert between different units of measurement.

Evaluate trig, logs, powers, and factorials with degree or radian mode.

Calculate adult BMI from metric or imperial measurements.

Add or subtract days, weeks, months, or years from a date.

Add, subtract, multiply, and divide fractions, mixed numbers, and decimals.

Calculate a tip and split the total between people.

Generate random integers or decimals, optionally unique.

Convert numbers to English words with international or Indian grouping.

Convert a local date and time between IANA time zones.

Find a percent of a number, reverse percents, percentage change, and marks to percentage.