What is Age Calculator?
Find an exact age rather than a rounded year. Enter a date of birth and any reference date to get years, months and days, plus total months, total days lived and a countdown to the next birthday.
How to use Age Calculator
- Enter the date of birth.
- Set the “as of” date — today by default, or a future date to check age on a deadline.
- Read the exact age, total days and days until the next birthday.
Why use this tool?
Exact, calendar-aware maths
Month lengths and leap years are handled properly, so the day count is accurate rather than an approximation based on 30-day months.
Check eligibility dates
Setting a future “as of” date shows the age on an application deadline or exam cut-off — useful for forms with strict age limits.
Frequently asked questions
Does it account for leap years?
Yes. Calculations use real calendar dates, so 29 February and varying month lengths are all handled correctly.
Can I calculate age on a past or future date?
Yes — change the “as of” field to any date after the date of birth.
Is this tool really free?
Yes, completely free with no limits, no watermarks, no account and no trial period. Because everything runs on your own device, there are no server costs to pass on to you.