Age Calculator Guide
What is the Age Calculator?
The Age Calculator computes your precise age from your date of birth to today. It breaks the result down into years, months, and days, then provides helpful totals including your total days and weeks lived, and a countdown in days to your next birthday.
How to calculate it manually
Subtract the birth date from today to get total days. Then count complete years, subtract to find the remaining months, subtract again for remaining days. Total weeks = total days ÷ 7 (rounded down).
Frequently Asked Questions
Calendar months have different lengths (28–31 days). The exact count depends on which specific months fall between your birthday and today.
Total days lived is divided by 7 and rounded down to the nearest complete week. Partial weeks at the end are not counted.
In non-leap years, your birthday is typically counted on 28 February or 1 March depending on your jurisdiction or convention. The calculator treats 28 Feb as your birthday in non-leap years.
Accurate to the day — it calculates from today's date to the next occurrence of your birth month and day in the current or following year.