Age Calculator
Calculate exact age in years, months, and days from a date of birth, as of any date you choose — instantly, in your browser.
Calculate exact age in years, months, and days from a date of birth, as of any date you choose. Enter your dates below — the result updates instantly, entirely in your browser.
How it works
Age is calculated as a real calendar difference — years, then months, then days — accounting for varying month lengths, not a flat 365.25-day divide. You can calculate age as of any date, not just today, which is useful for things like eligibility cutoffs or historical records.
FAQs
Why not just divide total days by 365?
That approach drifts because months and years vary in length (28-31 days per month, 365 or 366 days per year). This calculator counts real calendar years, months, and days, matching how age is normally expressed.