Date difference calculator
Pick a start and end date to see the gap between them in days, weeks, and months, plus an exact years, months, and days breakdown.
How it is measured
The total days come from subtracting one date from the other. The exact gap then borrows days and months as needed to show whole years, months, and days, while weeks and months are simple running totals of those days.
FAQs about date difference
How is the difference between two dates found?
The tool subtracts the start date from the end date to get the total days, then breaks that down into years, months, and days, and also shows weeks and months as running totals.
Does it include both the start and end day?
It counts the whole days that have passed between the two dates. If you need to count both endpoints, add one day to the total.
Can I use dates in the past and future?
Yes. Any two valid dates work, in any order on the calendar. The tool always shows the gap as a positive length of time.
Are leap years handled?
Yes. Because it works with real calendar dates, leap days and different month lengths are counted correctly without any manual fixing.
Why might month counts look approximate?
Months vary in length, so the years-months-days breakdown is exact, while the single "total months" figure is a rounded running count for quick reference.