Age Calculator

About this tool

Calculate exact age in years, months, and days from a birth date, along with total days lived and days until the next birthday.

How to use it

1. Enter your birth date.
2. Optionally enter a reference date to calculate age as of a specific day instead of today.
3. See your age broken down into years/months/days, total days lived, and days remaining until your next birthday.

Frequently asked questions

Can I calculate age as of a past or future date, not just today?

Yes - providing a reference date calculates age as of that date instead of the current date.

Does it account for different month lengths and leap years?

Yes - the day/month breakdown correctly accounts for varying month lengths when calculating the remainder.