Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Processed locally in your browserUnlock the full toolkit
Batch processing, no ads, higher limits, and API access.
How to Use
Find your exact age down to the day with this free online age calculator.
- Enter your date of birth. Pick or type the date you were born.
- Optionally change the "as of" date. It defaults to today, but you can set any target date to calculate age at a specific point in time.
- Read your age. The calculator shows your age broken down into years, months, and days, plus total months, total weeks, total days, and a countdown to your next birthday.
- Copy the result if you need it for a form, application, or document.
All calculations run in your browser — no data is sent anywhere.
Features
- ✓Exact age in years, months, and days
- ✓Total months, weeks, and days
- ✓Next birthday countdown
- ✓Custom "as of" date
- ✓One-click copy results
- ✓Fully client-side — no data leaves your browser
Frequently Asked Questions
- How does the age calculator work?
- The age calculator subtracts your date of birth from today (or a custom date) to determine your exact age. It accounts for varying month lengths and leap years to give precise results in years, months, and days.
- Can I calculate age between two arbitrary dates?
- Yes. Change the "as of" date from today to any past or future date to see how old you were or will be on that specific date.
- How are leap years handled?
- The calculator uses the actual calendar, so leap years (with 366 days) are fully accounted for in the total day count and age breakdown.
- How many days have I been alive?
- Enter your birth date and the calculator instantly shows your total days lived, along with total weeks and total months.