Date & Age
Age Calculator
Exact age in years, months, and days, plus next birthday.
🔒 Runs entirely in your browser — nothing here is ever uploaded
CalcoTools · Age Calculator · generated 8/23/2026, 12:24:23 PM
About the Age Calculator
Calculates exact age in years, months, and days from a birth date, along with total days lived and the number of days until the next birthday.
How to use it
- Enter your Date of birth.
- Read your exact age, total days lived, and days to your next birthday in the readout.
Formula
Age is the calendar difference between the birth date and today, adjusted for partial months and days — the same way you'd count on a calendar by hand.
Worked example
Someone born June 15, 1998, checked on August 9, 2026, is 28 years, 1 month, and 25 days old.
Recommendations
- • Handy for eligibility checks that use exact age — school cutoffs, contest rules, or legal minimums often depend on exact days, not just years.
- • The days-to-next-birthday figure is a quick way to plan ahead for a specific date.
- • For the gap between two arbitrary dates instead of a birthdate and today, use the Date Calculator.
Frequently asked questions
Calendar math isn't uniform — months have different lengths, so the calculator borrows days and months rather than dividing total days evenly.