General information only
Results are not legal, medical, financial or other professional advice, and they should not be the only basis for a decision that needs an exact, official age.
How results are worked out
- Calendar dates only: times of day, time zones and daylight saving time play no part.
- Leap years follow the Gregorian rule, including the rule for century years.
- Whole months are counted first; a month without the matching day ends on its last day (31 January plus one month is 28 or 29 February).
- A 29 February birthday counts as 1 March in other years by default, or as 28 February if you choose that option.
- Total hours are the number of days × 24.
The rules and their sources are explained on the home page.
Limits
- Old dates: the Gregorian calendar is used for every date. Countries adopted it in different years, so a date recorded in the older Julian calendar may give a different result.
- Counting conventions: laws and organisations don't all count month ends and 29 February birthdays the same way. Check the rule that applies to your purpose.
- Your input: a result is only as right as the dates entered. The line under each date box spells the date out so you can check it.
Ages in law and official rules
Rules such as the age of consent, school starting ages, retirement and pension ages, benefits and medical screening differ between countries and organisations, and each has its own definition of when an age is reached. The calculator only measures the time between two dates; it does not apply any of these rules. Check with the authority, organisation or professional concerned.
Links to other sites
The site links to the sources of its rules and to FinCalcBox, and its share buttons open social networks. We don't control those sites and aren't responsible for their content or how they handle your data.
No guarantee
We test the calculation against worked examples, but the site is provided as it is, without a promise that it is free of errors or always available. As far as the law allows, we aren't responsible for losses that come from relying on a result. Nothing here takes away rights you have by law that can't be excluded; see also the Terms of Use.
Changes and contact
We may update this page when the site changes; the date at the top shows the latest version. If something here is unclear, or you think a result is wrong, please tell us through the contact page.