Age Calculator
Calculate exact age in years, months, days and total units.
Defaults to today.
Choose a date of birth to calculate an exact age.
About the Age Calculator
Age looks simple until leap years and uneven month lengths get involved. This calculator works out the exact gap between a date of birth and any reference date, expressed as years, months and days, and also as total months, weeks, days and hours.
It adds the details people usually want next: the day of the week you were born, your next birthday and how many days remain until it.
How to use the Age Calculator
- 1Enter the date of birth.
- 2Leave the second date as today, or set it to calculate age on another date.
- 3Read the exact age breakdown.
- 4Check the next birthday countdown and day-of-week details.
Features
- Exact years, months and days with leap-year handling
- Totals in months, weeks, days and hours
- Day of the week for the date of birth
- Next birthday date and days remaining
- Age as of any chosen date, not only today
Why people use it
- Complete forms that ask for age at a specific date.
- Check eligibility thresholds accurately.
- Plan a milestone birthday with a precise countdown.
Common use cases
- Confirming a child's age in months for a medical form.
- Checking age on a scheme's cut-off date.
- Counting the days until a significant anniversary.
Privacy and your data
Everything you type or open here is processed by your own browser. No file, text or result is uploaded to a server, stored in a database or shared with anyone, and closing the tab clears it completely.
Frequently asked questions
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