Age Calculator
Enter a birth date and calculate exact age in years, months, and days instantly.
Birth date
Enter one birth date per line using YYYY-MM-DD or MM/DD/YYYY.
Processing happens locally in your browser; nothing is uploaded.
Age outputExact age from the birth date to today.
Typical inputs process in under 1ms on modern browsers.
How to calculate age
Calculate in 3 steps
Takes ~5 seconds- 1Enter birth date
Type or paste a date in YYYY-MM-DD or MM/DD/YYYY format.
- 2Run calculator
Click "Calculate age" to compute the exact difference.
- 3Copy result
Use the age breakdown wherever you need it.
Who should use this tool?
- Anyone checking exact age from a date of birth
- Teams filling out age-sensitive forms
- People verifying anniversary or birthday intervals
Examples
As of March 17, 2026, a July 15, 1990 birth date is this age.
1990-07-15
35 years, 8 months, 2 days
As of March 17, 2026, a leap day birthday is handled with exact calendar differences.
2000-02-29
26 years, 0 months, 16 days
As of March 17, 2026, US-style numeric dates are supported too.
12/25/2010
15 years, 2 months, 20 days
Calculate age quickly
Use one birth date and get an exact age breakdown without doing calendar math by hand.
Use this age calculator to find exact age from a birth date in years, months, and days. Enter a date of birth, calculate instantly, and copy the result for forms, records, or personal reference. Everything runs locally in your browser for fast, private processing.
Return an age as calendar years, months, and days instead of a rounded estimate.
- Years, months, and days
- Handles leap years
- Instant local calculation
Birth dates stay in the browser and never leave the page.
- No server upload
- Fast output
- Copy or download easily
Age calculator tips
Use a full birth date for the most accurate result.
- Prefer YYYY-MM-DD for the clearest input format.
- Double-check month and day order when using MM/DD/YYYY.
- Do not enter future dates.
Frequently asked questions
What date formats does this tool support?>
Does it calculate exact years, months, and days?>
Is my birth date sent to a server?>
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