Age Calculator
Exact calendar or continuous time — your choice
Total days
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Total weeks
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Total hours
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Use this Age Calculator to find your age from your date of birth. You can calculate your age today or on a specific date and view the result in years, months, days, weeks, hours, minutes, or seconds.
Age Calculation Method
Exact calendar age is calculated by counting completed years, completed months, and remaining days between the date of birth and the selected calculation date.
Calendar age = completed years + completed months + remaining days
The calculator also calculates continuous elapsed time:
Total weeks = total days ÷ 7
Total hours = total days × 24
Total minutes = total hours × 60
Total seconds = total minutes × 60
When birth time and calculation time are entered, they are included in the detailed elapsed-time result.
Example
Suppose someone was born on March 10, 2000 and their age is calculated on April 27, 2026.
From March 10, 2000 to March 10, 2026:
26 years
From March 10 to April 10:
1 month
From April 10 to April 27:
17 days
The exact calendar age is therefore 26 years, 1 month, and 17 days.
Important Notes
- Calendar months contain different numbers of days, so exact age should not be calculated by simply dividing total days by 30 or 365.
- Leap years contain February 29 and can affect total-day calculations.
- Average month and year results are approximations; calendar years, months, and days use actual date boundaries.
- Precise hour, minute, or second results depend on the birth time, calculation time, and local time handling.
- February 29 birthdays may be treated differently for legal or administrative purposes in non-leap years.
- For legal age, school eligibility, immigration, insurance, employment, or other official decisions, follow the rules of the relevant authority.