About the Age Calculator
How old are you exactly — not just in years, but months and days? An age calculator works out the precise time between a birth date and today (or any date you choose), which is useful for forms, eligibility checks, milestones and simple curiosity.
Enter a date of birth and the tool instantly shows the age in years, months and days, plus the total days lived. The calculation runs entirely in your browser and no personal data is stored.
How to use it
- 1Enter the date of birth.
- 2Optionally change the 'age at' date if you want the age on a different day.
- 3Read the exact age in years, months and days.
- 4Check the total number of days if you need it.
- 5Use it for forms, eligibility or milestone planning.
Common uses
- →Filling in an exact age on an official form or application.
- →Checking whether someone meets an age requirement.
- →Counting down to a birthday or milestone.
- →Working out a child's age in months for health records.
- →Calculating the age difference between two people.
Tips & good to know
- Leap years are handled automatically, so the day count stays accurate.
- Set the 'age at' date to a future date to see how old someone will be then.
- Total days lived is a fun stat — and useful for precise medical or legal contexts.
Frequently asked questions
- Does it account for leap years?
- Yes. The calculation uses real calendar dates, so leap years and varying month lengths are handled correctly.
- Can I calculate age on a past or future date?
- Yes. Change the second date to any day to see the age as of that date.
- Is my birth date stored?
- No. The calculation runs in your browser and nothing is saved or uploaded.