About this age calculator
This age calculator works out an exact age — years, months and days — between a date of birth and any other date, not just today. It also shows the total number of days and weeks lived, and how many days remain until the next birthday. Useful for school and job applications, official forms that ask for 'age as at' a given date, and simple curiosity.
How to use it
- Enter the date of birth.
- Leave 'Age at date' as today, or change it to any past or future date.
- Read the exact age, totals and next-birthday countdown.
Worked example
Frequently asked questions
How is the exact age calculated?
Full years are counted first, then full months, then the remaining days — taking the real number of days in each month (including leap years) into account, the same way official age is normally stated.
Can I calculate age at a future date?
Yes. Change the 'Age at date' field to any date — for example a school admission cutoff or a job application deadline — and the age is worked out as at that date.
Why does the total days figure matter?
Some forms and medical contexts use days or weeks instead of years. The totals here are exact day counts between the two dates you enter.
Is my date of birth stored anywhere?
No. The calculation happens entirely in your browser; nothing you enter is sent to a server or saved.