Age Calculator
Exact age in years, months and days, plus a breakdown of every unit of time.
You are
Pick a date of birth above to see your age.
How to use
- Enter your date of birth (or any past date).
- Optionally change the target date - it defaults to today.
- See your exact age in years, months, days, plus totals in every unit.
- The card also shows the weekday you were born and your next birthday.
- Hit Copy summary to paste the result into a message or note.
Frequently asked questions
How is the age in years, months and days calculated?
Months have different lengths, so the calculator computes complete months and then counts remaining days based on the actual calendar, matching how most people informally express age.
Does it handle leap years?
Yes. The calendar arithmetic accounts for leap years, so a birthday on 29 February correctly identifies the next valid birthday in non-leap years.
Can I use it for any two dates?
Yes. Set both the start date and target date manually to find the difference between any two moments, such as time since a hire date or anniversary.
Is my birthday data sent anywhere?
No. The page processes the date entirely in your browser; nothing about you or the date you typed is transmitted.
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