01 / Fast steps
- Choose a start date.
- Choose an end date.
- Read the difference instantly, in days, weeks, months and years.
Date Difference Calculator
Pick a start and end date to instantly get the number of days, weeks, months and years between them.
Updates instantly as you type
02 / Best for
- Counting the days left until a deadline or event.
- Working out someone’s age or a project duration.
- Calculating a billing or notice period between two dates.
03 / Why here
- Updates instantly as you pick dates, no need to click run.
- Reports the difference in several useful units at once.
- Runs entirely in your browser.
04 / Keep in mind
- Assumes calendar days starting at midnight and does not account for time zones or time-of-day.
Tool connections
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Good to know
Questions & answers
01Does the order of the two dates matter?
No, the tool always shows the absolute difference regardless of which date you enter first.
02Are the month and year counts exact?
Yes, the calendar difference is computed from actual calendar months and years, not a fixed 30-day average.
03Is Date Difference Calculator free to use?
Yes, Date Difference Calculator is completely free, with no sign-up and no usage limits. It runs entirely in your browser, so your data never leaves your device.