Age Calculator

Exact age in years, months and days, plus your next birthday.

Your age
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Total months
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Total weeks
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Total days
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Total hours
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Born on a
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Star sign
Age rules for legal and eligibility purposes vary by country — check the exact cut-off rule that applies to you.
How this works
Years = completed years between the dates Months = completed months since the last birthday Days = days since the last monthly anniversary
RuleApplied as
Counting methodCalendar months, not 30-day blocks
29 Feb birthday1 March in non-leap years
Leap yearEvery 4th year; century years only if divisible by 400
Eligibility cut-offsSet the "age as of" date
How do I find my age on a future or past date?

Fill in the "age as of" field. This is useful for eligibility cut-offs, exam applications and retirement planning.

How is age counted for a 29 February birthday?

In years without a 29 February, most legal systems treat 1 March as the anniversary. This calculator uses the same convention.

Does this send my date of birth anywhere?

No. The whole calculation runs in your browser. Nothing you enter is transmitted or stored.

How many days old am I?

Enter your date of birth above — the "Total days" figure in the results gives the exact count from birth to today (or to whatever date you set in "age as of").

Keep going
Date Difference Calculator Days between two dates, with or without weekends — plus add or subtract days. BMI Calculator Body mass index in metric or imperial, with your healthy weight range. Day of the Week Calculator What day of the week any date falls or fell on.