Calculate exact age in years, months, and days between any two dates, with a next-birthday countdown.
Working out age for forms, eligibility, milestones, or just curiosity.
Enter the date of birth
Pick the birth date with the date selector.
Set the target date
Leave it on today for current age, or choose any past or future date to find the age at that point.
View the breakdown
See the exact years, months, and days, plus totals in weeks, days, and hours, and a countdown to the next birthday.
Working out an exact age in your head is deceptively hard. Months have different lengths, leap years add a day every four years, and "two years and a bit" is rarely precise enough for a form that asks for age in years, months, and days. Whether you are completing an application, checking eligibility for an age-restricted service, or just curious how many days old someone is, doing it by hand is fiddly and easy to get wrong by a day or two. This calculator removes the guesswork. Enter a date of birth and it computes the exact difference to today — or to any date you choose — in years, months, and days, and also expresses the total in months, weeks, days, and hours. It even counts down to the next birthday. All calculations use real calendar dates so leap years are handled correctly, and everything runs in your browser, so the dates you enter are never uploaded. No account, no limit.
Forms & eligibility
Confirm an exact age for applications, age-restricted services, pensions, or benefits.
Milestones & gifts
Find out how many days or hours someone has been alive for a birthday surprise or card.
Event planning
Work out how old someone will be at a future wedding, graduation, or trip.
Parenting
Track a baby’s age in weeks and months for appointments and developmental milestones.
HR & records
Verify ages from birth dates accurately for compliance and record-keeping.
Yes. It uses real calendar dates, so the 29th of February and leap years are handled correctly.
Yes. Set the target date to any date on or after the date of birth to get the age at that moment.
It counts full calendar months and the remaining days between the two dates, rather than averaging 30-day months, so the result is exact.
Yes — it tells you how long until the next birthday from the target date.
Yes; treat the first date as the "birth" date and the second as the target to measure any duration. For pure date gaps, the Date Duration Calculator is also available.
You select dates from a calendar picker, so there is no ambiguity between day-first and month-first formats.
No. All the date math runs locally in your browser.
Yes — calculate as many ages and dates as you like for free, with no account needed.