Date & time

Pick a tool below. Each page includes formulas, steps, and examples.

Dates

Age Calculator

Calculate your exact age in years, months, and days from your date of birth. See total days lived and days until your next birthday. Free online age calculator.

Date Difference Calculator

Calculate the exact number of days, weeks, months, and years between any two dates. Also counts business days. Free date difference calculator.

Duration

Time Duration Calculator

Calculate the duration between two clock times or convert hours, minutes, and seconds to total hours and minutes. Free time duration calculator.

Timezones

Timezone Converter

Convert times between any two timezones with automatic Daylight Saving Time support. Covers UTC, US, European, Asian, and Pacific timezones using the IANA timezone database.