Age Difference Calculator

Enter two dates of birth to compare ages, see who is older and get the exact difference down to the day.

Label for Person A (optional)

Person A - Date of Birth

Format: DD/MM/YYYY

Label for Person B (optional)

Person B - Date of Birth

Format: DD/MM/YYYY

Enter both dates of birth to compare ages

Your full age report - chronological age, zodiac sign, planetary ages, milestones and more - will appear here.

Who is considered older?

The person with the earlier date of birth. If the dates are identical, the difference is zero and neither is older.

How is the age difference expressed?

As full years, months and days, plus the equivalent in weeks, hours and minutes for a quick overview.

Can I use custom labels instead of Person A and Person B?

Yes. Type your own labels, for example names like 'Alice' and 'Bob', and they will be used in the headline and summary.

Does the difference account for leap years?

Yes. All date math uses a tested library, so leap years, February 29 and month-end dates are handled correctly.

How precise is the result?

The difference is computed on exact calendar dates and is precise to the day.

Can I share or save the result?

Yes. Use the Copy or Share buttons to send a plain-text summary, or download a branded PDF report.

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1
Enter the first date (Person A) and the second date (Person B).
2
Optionally type custom labels such as names instead of Person A and Person B.
3
The calculator shows the age difference in years, months and days.
4
Get extra breakdowns in weeks, hours and minutes, then copy, share or export the result.