Can I calculate an age on a past or future date?
Yes. Change the “Age on this date” field to any valid date after the birth date.
Free Online Exact Age & Birthday Calculator
Find an exact age in years, months, and days. This free online tool gives you the result immediately in your browser.
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Private by design: this tool works on your device. Your information is not uploaded.
How to use this age calculator
- Enter the person’s date of birth.
- Leave today’s date selected, or choose a different date.
- Select “Calculate age” to see the exact years, months, and days.
Common questions
Does this account for different month lengths?
Yes. The calculator uses calendar years, months, and days instead of treating every month as the same length.
Is the birth date saved?
No. The calculation happens in your browser, and the date is not sent to us.