How to use the age calculator
- Select your date of birth.
- See your exact age and the countdown to your next birthday instantly.
How age is calculated
Your age is the time elapsed from your birth date to today, broken into full years, then remaining months, then remaining days — the same way you'd say "32 years, 4 months and 9 days old."
Benefits
- Gives your exact age in years, months and days.
- Works for any birth date, instantly.
- Runs in your browser with nothing to install.
- Free and unlimited.
Limitations to know
- It works from calendar dates and does not account for time zones or the time of day you were born.
- It assumes the standard modern calendar and does not handle historical calendar changes.
- It measures elapsed time, not any legal definition of age.
Common mistakes to avoid
- Entering the month and day in the wrong order.
- Expecting it to factor in the exact hour of birth.
- Using it to judge a legal age-of-majority question without checking local rules.
Alternatives
To measure the gap between two arbitrary dates, a date-difference tool is a better fit. For percentage math, use the Percentage Calculator.
Last updated: August 2026 · Reviewed by the AI Toolbox editorial team.
Frequently asked questions
Is my birth date stored?
No — the calculation runs entirely in your browser.
Does it handle leap years?
Yes, it accounts for leap years and varying month lengths.