Age Calculator
Calculate your age in years, months, and days, and see when your next birthday arrives.
Processed in your browserA simpler way to use the age calculator
Find the elapsed calendar years, months, and days between your date of birth and a chosen date. Calculations use calendar dates rather than time zones or hours. When a matching day does not exist in a month, the date is clamped to that month’s last day. February 29 birthdays are treated as February 28 in non-leap years for the next-birthday display.
How it works
- Enter your date of birth.
- Use today’s date or select another comparison date.
- Calculate to see your age and next birthday.
Your data stays with you.
Your file and form inputs don’t leave your device. This tool works locally in your browser. We only save recently opened tool names and optional feedback on this device.
What does Age Calculator do?
Calculate your age in years, months, and days, and see when your next birthday arrives.
- Cost and account
- Free to use. No account required.
- Processing
- In this browser
- Device requirements
- Desktop, tablet or phone with a supported modern browser; file and memory limits still apply.
Frequently asked questions
Can I calculate age on a past or future date?
Yes. Change the comparison date to any valid date on or after your birth date.
How are leap-day birthdays handled?
For February 29, the next birthday is February 28 in a non-leap year and February 29 in a leap year. Legal birthday rules can differ by jurisdiction.
Is my date of birth saved?
No. Dates are used only in this page’s memory and are not stored or uploaded by the application.