Age Difference Calculator
Find the years, months and days between two dates.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Age Difference Calculator
How to use this tool
- Enter your values in the fields above.
- Press Generate. The result appears below the buttons.
- Use Load sample to see a worked example, or Clear to start again.
Worked example
From 15 January 1990 to 25 October 2026 is 36 years, 9 months and 10 days.
What this tool does not do / Limits
This counts calendar years, months and days between the two dates in either order. It does not account for time zones or times of day; both dates are treated as whole calendar days.
Frequently asked questions
Does the order of the dates matter?
No. The earlier date is used as the start either way, so swapping the two dates gives the same difference.
Does it include the end date?
The total days is the number of days between the dates, not counting both endpoints. From Monday to the following Monday is 7 days, for example.
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