Age Calculator Online
Work out an exact age in years, months and days from any date of birth.
How to use this tool
- 1Enter the date of birth.
- 2Set the date to calculate up to, or leave it as today.
- 3Read the exact age in years, months and days.
- 4Check the totals and the countdown to the next birthday.
About this tool
Age sounds simple until a form demands precision. School admissions apply a cut-off date to the day. Visa applications, pension eligibility, insurance premiums and sports age categories all hinge on an exact figure rather than a rounded one. Counting by hand is where mistakes creep in, because months are different lengths and leap years quietly add a day. This calculator does the arithmetic properly: it counts complete years first, then remaining months, then remaining days, handling February and month-end edge cases correctly. You can calculate up to today or to any future or past date, which is what you need when a rule says 'as of 1 April'. It also shows the total days lived and how long until the next birthday.
Frequently Asked Questions
Does it handle leap years?
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Yes. Leap days are counted correctly, including for people born on 29 February.
Can I calculate age at a future date?
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Yes. Change the second date to any past or future day, which is useful for eligibility cut-offs.
Why does my age differ from a simple year subtraction?
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Subtracting birth years ignores whether the birthday has already happened this year. This calculator accounts for it.