Age Calculator

Calculate exact age in years, months and days between any two dates. The calculator also shows total weeks, days, and hours, plus a countdown to your next birthday and a few satisfyingly large numbers (heartbeats, breaths, full moons seen).

How to use the age calculator

1. Enter your birth date. Use the date picker to set the start date.
2. Enter the end date. Defaults to today; change it to calculate age at any moment in the past or future.
3. Read your age. The big number shows years, months, and days. Below it: total weeks, days, hours, and the countdown to your next birthday.

Example

Born 14 June 1995, age on 15 May 2026: 30 years, 11 months, 1 day. That's 372 months, 1,615 weeks, 11,293 days, or roughly 271,022 hours.

Frequently asked questions

How is age in years, months and days calculated?

Calendar years first, then leftover full months, then remaining days. Days are borrowed from the previous month if the end day is earlier in the month than the start day.

Does it handle leap years?

Yes — total-day counts use real calendar dates, so February 29 birthdays and 366-day years are accounted for.

Can I calculate between two past dates?

Yes. Both fields are date pickers; you can set any two dates to get the exact interval.