Age Calculator
Find the exact age in years, months, and days — plus totals and the countdown to the next birthday.
Age Calculator — Enter a date of birth to get the exact age in years, months, and days, using real calendar arithmetic — month lengths and leap years included. Optionally pick a target date to compute the age at that moment instead of today.
Dates are processed locally in your browser and never uploaded.
What is age calculator?
Enter a date of birth to get the exact age in years, months, and days, using real calendar arithmetic — month lengths and leap years included. Optionally pick a target date to compute the age at that moment instead of today.
Totals in months, weeks, and days plus a countdown to the next birthday make it handy for forms, milestones, and curiosity alike.
How to use it
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Pick the date of birth
The age at today’s date appears immediately.
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Optionally set a target date
See the age as of any other date, past or future.
Examples
A birthday mid-year
Born 15 Jan 1990, age on 20 Jun 2026.
1990-01-15 → 2026-06-20
Result: 36 years, 5 months, 5 days