Age Calculator
Find your exact age in years, months and days — plus fun totals like days lived, weeks lived and your next birthday countdown.
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Years
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Months
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Days
Total days lived—
Total weeks—
Total months—
Total hours (approx.)—
Next birthday in
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How to use the Age Calculator
Pick your date of birth.
Optionally pick a different “as of” date to know your age on any day.
Press Calculate age to see your exact age and totals.
Frequently asked questions
How is exact age calculated?
Age counts full years first, then remaining full months, then leftover days — the same convention used on official documents.
Can I calculate age at a past or future date?
Yes — change the “Age at the date of” field to any date to see how old someone was or will be.
Does it account for leap years?
Yes — the calculation works with actual calendar dates, so leap days (29 February) are handled correctly.