About age calculation
This age calculator works out your exact age from your date of birth — in years, months and days — and also shows your age as a total number of months, weeks and days, the weekday you were born, and how long until your next birthday. It runs in your browser; nothing is uploaded.
How Age works
How it works
It counts whole years from your birth date to today, then the remaining whole months, then the leftover days, borrowing days from the previous month when needed — the same way you would count an age by hand. Totals are the full span divided into months, weeks (÷7) or days.
Worked example
Born March 15, 1990, measured on June 6, 2026: that is 36 years, 2 months and 22 days. As totals that is about 434 months, roughly 1,890 weeks, and about 13,232 days. Your next birthday (March 15, 2027) would be 282 days away.
Common uses
- Find your exact age
- Work out age in days or weeks
- Calculate age on a specific date
- Count down to your next birthday
- Find the weekday you were born
- Check age for forms and eligibility
- Work out a child age in months
- Compare two ages