Calculator
About Age Calculator
Use this free age calculator to calculate exact age in years, months, days, and total days between two dates.
Tool details and FAQUse cases, limits, privacy, and related tools
Overview
Calculate age from a birth date to today or any selected as-of date. It is useful for birthdays, date-of-birth checks, elapsed-day counts, and quick calendar calculations.
Best for
- Calculating age from date of birth.
- Checking years, months, days, and total days between dates.
- Quick birthday and elapsed-day calculations in the browser.
Not for
- Legal identity, eligibility, or compliance decisions.
- Time-zone, time-of-day, or jurisdiction-specific age rules.
How it works
- Enter a birth date or start date.
- Choose the as-of date.
- Read years, months, days, and total days.
Limits and privacy
The calculator uses calendar dates only. It does not account for time of day, time zones, legal age definitions, or jurisdiction-specific rules.
Common uses
- Find out exactly how old someone is on a chosen date.
- Calculate days since a birthday or event.
- Check age in years, months, and days without a spreadsheet.
Useful facts
- Tiny Work Tools Age Calculator runs locally in the browser.
- It reports both calendar age and total elapsed days.
Age calculator workflow
Choose the birthday, date-of-birth, how-old-am-I, or exact age path before entering dates.
FAQ
Can I calculate age on a future or past date?
Yes. Set the as-of date to the date you want to check, as long as it is not before the birth or start date.
Does it show total days?
Yes. The result includes years, months, days, and total elapsed days.
Can I use this for legal age checks?
No. It is a general calendar calculator, not a legal eligibility or compliance tool.