Age Calculator
Calculate calendar age between a date of birth and a selected as-of date.
What this calculator does
Calculate the calendar difference between a date of birth and selected date. The result is shown in years, months and days; choose another as-of date for a past or future event date.
How to use it
- Enter date of birth
- select as-of date
- calculate
- review years, months and days.
Formula and calculation method
Worked example
Important information
Calendar calculations account for month lengths and leap days. The selected as-of date should not be earlier than the date of birth.
Frequently asked questions
How accurate is this calculator?
It provides an estimate based on the values and assumptions entered. Verify important decisions with the relevant provider or a qualified professional.
Does this replace professional advice?
No. It is an informational tool and does not replace tax, legal, accounting, lending, investment or medical advice.
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Browse all calculators AboutResults are estimates based on entered values and assumptions. They are not professional advice. Verify important decisions with the relevant provider or a qualified professional.