Age difference calculator

Age difference — — days total

Calculates the exact difference between two dates in years, months and days. Useful for couples, siblings or any pair of dates.

This age difference calculator works out the exact difference between two dates in years, months and days, plus the total number of days between them.

The exact difference

Beyond a rough “about X years apart,” this tool gives the precise difference in years, months and days, and the total day count between both dates. Everything is calculated in your browser; nothing is sent anywhere.

FAQ

How is the age difference calculated?

It counts the difference between the two dates in whole years, plus the remaining months and days, accounting for the real length of each month.

Does it work for any pair of dates?

Yes — couples, siblings, or the time between any two events. The order you enter the dates in doesn't matter.

Does it also show the total number of days?

Yes, alongside the years, months and days breakdown, the tool shows the total number of days between the two dates.