Age Calculator
Calculate precise age from a birth date down to the day.
Private & SecureRuns in your browser — nothing is uploaded
Easy to UseJust paste or type — instant results
Free ForeverUnlimited use, no sign-up
Fast & ReliableAdvanced tech, fast and stable
Telling someone your exact age, or working out how many days until a milestone, is harder than it sounds once months of different lengths get involved. Enter a birth date and this gives your age in years, months and days, plus the total days you have been alive.
How to use: Age Calculator
- 1Enter inputSelect or type your date of birth.
- 2Set optionsOptionally set a target date to age up to (defaults to today).
- 3ProcessClick Calculate.
- 4Get resultRead your exact age in years, months, weeks and days.
Common use cases
Exact age for a formGet your age in years, months and days for an application that asks precisely.
Count the days livedSee the total number of days since a birth date, a fun and sometimes useful figure.
Check eligibilityConfirm whether someone has reached an age cut-off by a specific date.
Plan a milestoneWork out the date of a 10,000-day mark or a round birthday to celebrate.
Good to know
Months are not equalBecause months run 28 to 31 days, age in months and days is not a simple division. The tool counts real calendar months so it stays accurate.
Pick the as-of dateAge is always relative to a date. Set it to today, or to any date, to see the age then.
Leap years are handledA 29 February birthday is counted correctly; the tool follows the real calendar rather than rounding the year to 365 days.
Time zones can shift a dayRight at midnight the date depends on your zone, so a borderline result may differ by a day across regions.