Date Calculator

Calculation

Days between datesAdd or subtract

Start date

End date

Include the end date (add 1 day)

Choose an end date.

Age CalculatorFind an exact age in years, months and days on any date, with totals in months, weeks and days and the countdown to the next birthday.
Chronological Age CalculatorWork out a chronological age in years, months and days on a test date, by calendar months or the 30-day borrowing method, with optional rounding.
Unit ConverterConvert length, weight, temperature, area, volume (US and UK), speed, time, data storage and pressure units with exact conversion factors.