Date Difference Calculator
Calculate the exact difference between two dates in days, weeks, months, years, and more.
Select both dates to calculate the difference between them.
Frequently Asked Questions
How is the difference calculated?
The tool computes both a calendar-based breakdown (years, months, days accounting for month lengths) and simple totals (total days, weeks, hours, minutes) from the millisecond difference.
Does it count leap years and varying month lengths?
Yes. The calendar breakdown handles leap years and months of different lengths, so the years/months/days result is exact.
What if the end date is before the start date?
The tool uses the absolute difference, so it works in either direction. Order does not matter.
Is my data sent anywhere?
No. All calculation happens in your browser. Nothing leaves your device.
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