Age Calculator
Calculate age or the exact difference between two dates in years, months, weeks, days, hours, minutes and seconds.
What Is the Age Calculator?
The Age Calculator finds the exact time between two dates — perfect for working out someone's age or the gap between any two dates. It breaks the result into years, months and days, and also shows the total months, weeks, days, hours, minutes and seconds. Everything runs locally in your browser.
How It Works
Pick a start date and time (or birth date) and an end date and time. Use the Now button to set the end to the current moment. The breakdown updates instantly; the order of the two dates doesn't matter.
When to Use It
Use it to calculate age, anniversaries, project durations, deadlines, or how many days are left until (or since) an event.
Frequently Asked Questions
- Does it count leap years?
- Yes. The calculation uses real calendar dates, so leap years and varying month lengths are handled correctly.
Last reviewed: 2026-06-27