Age Calculator
Find your exact age in years, months and days from your birth date.
Figuring out your exact age down to the day isn't hard math, but it's fiddly enough that people reach for a calculator rather than counting months on their fingers. Enter your birth date to get your precise age in years, months, and days.
Why "just subtract the years" isn't quite right
If your birthday hasn't happened yet this year, subtracting birth year from current year overstates your age by one — this calculator accounts for whether your birthday has passed this year, plus the exact month and day difference, not just a rough year count.
Frequently asked questions
Why would I need my age in total days?
Total days lived is used for some medical dosing calculations, novelty milestones, and certain eligibility rules that specify days rather than years.
Does this account for leap years?
Yes — the calculation is based on actual calendar dates, so leap years are automatically factored into the day count correctly.