Age Calculator
Calculate exact age from a date of birth.
Runs entirely in your browser
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How to use
- Enter the date of birth.
- Leave the second date as today, or set it to work out an age at another date.
- Select Calculate age.
- Read the exact age in years, months and days, plus the totals below.
Features
- Exact age in years, months and days, not a rounded decimal.
- Totals in days, weeks, months and hours.
- The weekday you were born on, and days until the next birthday.
- Dates are handled as plain calendar dates, so the result never shifts with your timezone.
Frequently asked questions
- How are months counted?
- Whole calendar months are counted first, then the leftover days. Borrowing uses the length of the preceding month, which is what people mean by being one month older.
- What about someone born on 29 February?
- In a non-leap year the anniversary falls on 1 March, which is the convention most jurisdictions use. On 28 February they are still the younger age.
- Can I calculate an age in the past?
- Yes. Change the second date to any date on or after the date of birth to get the age as it was then.
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