Age Calculator
Enter your date of birth to see your exact age in years, months and days, along with your age in total days, weeks and months. It updates as of today.
How to use the age calculator
- Enter your date of birth.
- The calculator measures the time up to today automatically.
- Read your exact age in years, months and days, plus total days, weeks and months.
Examples
Born on 1 Jan 2000, measured on 1 Jan 2024
Date of birth: 2000-01-01
24 years, 0 months, 0 days (8,766 total days)
A leap-day birthday on a non-leap year
Date of birth: 2000-02-29, as of 2024-02-28
23 years, 11 months, 30 days (not yet 24)
Frequently asked questions
How is age counted?
Age is counted in full calendar years, then the leftover full months, then the leftover days. You only gain a year on your birthday, not before it.
How do leap-year birthdays work?
If you were born on 29 February, you complete a full year on 28 February in common years and on 29 February in leap years. Until that day passes you are still the previous age.
Why is the exact age different from the total months or days?
The years, months and days figure is your exact calendar age. The totals re-express that same span purely in days, weeks or months, so they look larger but describe the same age.
How are total days and weeks calculated?
Total days is the whole number of days between your birth date and today. Total weeks is that day count divided by seven and rounded down, so any extra days are not counted as a full week.
Which date does it measure up to?
By default it measures from your date of birth to today's date in your device's calendar. The math runs entirely in your browser.
Is my date of birth stored anywhere?
No. Everything is calculated locally in your browser and nothing is uploaded or saved.
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