Age Calculator
Enter your date of birth to calculate your exact age in years, months, and days. See your age in different units and find out how many days until your next birthday.
Age
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Total months
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Total weeks
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Total days
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Next birthday in
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About This Calculator
This age calculator determines your exact age from your date of birth to any given date. It accounts for varying month lengths and leap years to give you a precise breakdown in years, months, and days. Whether you need your age for official documents, health assessments, eligibility checks, or simply out of curiosity, this tool provides instant and accurate results. It also shows your age expressed in total months, weeks, and days, along with a countdown to your next birthday.
FAQ
How is age calculated?
The calculator finds the difference between your date of birth and the target date. It counts complete years first, then remaining complete months, then remaining days. Each step uses the actual number of days in each month, so the result is precise.
Does this account for leap years?
Yes. The calculation uses actual calendar dates, so leap years (including February 29) are handled correctly. If you were born on February 29, your birthday in non-leap years is considered as March 1 for the "next birthday" countdown.
Can I calculate age between two dates?
Yes. By default the "Calculate as of" field is set to today, but you can change it to any date. This lets you find the age difference between any two dates, past or future.
What units are shown?
You get the age in years, months, and days, plus the total expressed as months, weeks, and days. The countdown to your next birthday is shown in days.