Age Calculator

To calculate your exact age in years, months and days, subtract your date of birth from today. Account for whether your birthday month has passed this year and handle month-length differences correctly. Our calculator handles all edge cases automatically.

Enter your date of birth and our calculator shows your total days lived. For example, a 30-year-old is approximately 10,950 days old (accounting for leap years). The stat box below your result shows the exact number.

Leap year birthdays (February 29) are handled correctly by our calculator. In non-leap years, your birthday is counted on March 1 for the purposes of calculating your age.

Yes. Just enter their date of birth in the first field. You can also change the second field (Calculate Age As Of) to any date — past or future — to calculate their age at that specific date.

Enter the earlier date as the Date of Birth and the later date as the Calculate Age As Of date. The result shows the exact time between those two dates in years, months and days.