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Age Calculator
Utility
Free age calculator for years, months, and days between a birth date and an as-of date - plus next birthday countdown.
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Birth Date
Calendar age; month ends and leap-day birthdays use the last day of the month.
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Select your birth date to calculate your age
Calendar age between a birth date and an as-of date (UTC date-only). Shows years/months/days, totals, and next birthday.
See moreSee less about the Age Calculator
Not a legal age or timezone wall-clock calculator.
Examples
Day before a birthday
Birth 1990-06-15 · As of 2024-06-14 → 33 years, 11 months, 30 days · 1 day to next birthdayA plain year subtraction would say 34. Dates are calendar dates (UTC date-only); month ends and leap-day birthdays use the last day of the month.
Age as of a past date
Set As of to any calendar day to see age on that date, not only todayNot a legal-age or timezone wall-clock calculator.
Key features
- Years, months, days
- Next birthday countdown
- As-of date control
Related tools
Quick answers for Age Calculator
What breakdown does the Age Calculator show?
Enter a birth date and an as-of date. It shows years, months, and days of calendar age, plus totals in days, weeks, and hours, and the next birthday countdown from the as-of date.
Does it tell me when my next birthday is?
Yes. It shows the next birthday date and how many days remain until then, relative to the as-of date.
How does it handle leap-day birthdays?
Dates are treated as calendar dates (UTC date-only). Month ends and leap-day birthdays use the last day of the month when needed.
Is this a legal-age calculator?
No. It reports calendar age for the dates you enter. It does not apply jurisdiction-specific age-of-majority rules.