Age Calculator
Calculate your exact age in years, months, and days from your date of birth. Also see total months, weeks, days, and your next birthday countdown.
Select your date of birth and click
Calculate Age
How Does the Age Calculator Work?
The age calculator determines your exact age by comparing your date of birth with today's date (or any date you choose). It calculates the difference in years, months, and days, accounting for varying month lengths and leap years.
Age Calculation Method
Age = Current Date − Date of Birth
The calculator breaks the result into:
- Years: Complete years elapsed since birth
- Months: Remaining months after complete years
- Days: Remaining days after complete months
Additional Information Provided
- Total Months: Your entire age expressed in months
- Total Weeks: Your entire age expressed in weeks
- Total Days: Your entire age expressed in days
- Next Birthday: Days remaining until your next birthday
Age Calculation Example
If your date of birth is January 15, 1995 and today is March 23, 2026:
- Exact Age: 31 years, 2 months, 8 days
- Total Months: 374 months
- Total Weeks: 1,627 weeks
- Total Days: 11,389 days
- Next Birthday: 298 days until next birthday
Frequently Asked Questions
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The calculator subtracts your date of birth from the current date, accounting for different month lengths (28-31 days) and leap years. It gives you the precise age in years, months, and days.
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Yes. The age calculator correctly handles leap years (years divisible by 4, except centuries not divisible by 400). If you were born on February 29, the calculator still computes your age accurately.
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Yes. Use the "Calculate Age On" field to pick any date. This is useful for finding how old you were on a past date or how old you will be on a future date.
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Total weeks are calculated by dividing the total number of days between your birth date and the target date by 7. The result is shown as a whole number (rounded down).
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Because months have different lengths (28, 29, 30, or 31 days), the remaining days component varies. The calculator uses the actual calendar to determine the correct count.