Age Calculator

Enter your birth date and select Calculate. The result shows your age in years, months, and days as of today, plus the total number of days you've been alive. Your most recent birthday counts as the start of the current year of your age, the same way people count age in everyday conversation.

Yes. Change the "Calculate age as of" field to any date, past or future, and the calculator will show your age as of that date instead of today. This is useful for things like eligibility cutoffs or figuring out your age on a specific exam date.

Switch to the "What year was I born?" mode, enter your current age, and the calculator shows both possible birth years. A stated age alone can't pin down a single exact birth year, since it depends on whether your birthday has already happened this year, so this calculator shows both real possibilities rather than guessing one.

Decimal age expresses your age as a single number with a fraction, like 32.44 years, instead of a years/months/days breakdown. It's calculated as total days lived divided by 365.25, the average length of a year accounting for leap years, and is commonly used in medical, scientific, and actuarial contexts. It's a useful approximation, not a replacement for the exact years/months/days figure shown above it.