Age Calculator

Calculate age in years, months, and days from a birth date or compare any date against a target date.

Open Age Calculator

What it is useful for

Age calculations are common for forms, school records, eligibility checks, milestone planning, pet records, and historical date comparisons.

Accuracy considerations

Age depends on the target date and local calendar interpretation. For official forms, use the exact date requested by the organization reviewing the form.

Not an official determination

The calculator is a convenience tool. Government, school, insurance, and medical eligibility rules may use their own definitions or cutoff dates.

Practical tip

If a deadline says the person must be a certain age by a specific date, set that deadline as the target date rather than using today's date.

How to use it

1. Enter the birth date or starting date.
2. Choose the target date if it is not today.
3. Review the age breakdown and confirm official rules separately when needed.

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