Calculator
Age Calculator
Calculate exact age in years, months, and days between two dates, plus total days, weeks, and months.
How to use
- 1
Enter your date of birth.
- 2
Optionally change the "age at" date — it defaults to today.
- 3
Click Calculate age.
- 4
See your exact age plus total days, weeks, and months lived.
Features
- Exact age in years, months, and days
- Calculate age as of any date, not just today
- Also shows total days, weeks, and months
- Runs entirely in your browser
Frequently asked questions
Can I calculate age as of a future or past date?
Yes — change the "age at" date to any date; it defaults to today's date.
How are leap years handled?
The calculation accounts for actual calendar days, so leap years are handled correctly.
Why do total days and total months look different from the years/months/days figure?
Total days/weeks/months are simple totals since birth, while the years/months/days figure breaks that same span into calendar units.
Is my birth date stored anywhere?
No — the calculation happens locally in your browser and nothing is saved or uploaded.