Date Difference Calculator
Count the time between two dates — in days, weeks, months and years, plus the number of weekdays (business days) in the range.
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Result
Please select both dates.
How to use
Step-by-step guide for this tool
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Save ⟶How to use the Date Difference Calculator
- 1Enter start date in the form on the left.
- 2Fill in the remaining fields — the result updates automatically as you type.
- 3Review the highlighted result and the supporting breakdown on the right.
- 4Use Copy, Share or Print to save or send your result.
Inclusive vs. exclusive day counting
From Monday to Friday is four elapsed days but five calendar days if you count both endpoints. Deadlines, interest accrual and project plans differ on which convention they use — this calculator reports elapsed days (end date excluded), the most common convention.
Business-day counts here exclude Saturdays and Sundays but not public holidays, which vary by country. For contractual deadlines, always check the governing definition of 'business day'.
Frequently Asked Questions
▸Are both dates included in the count?
The start date is included and the end date excluded (elapsed-days convention). Add 1 to the total if your use case counts both endpoints.
▸Does it account for leap years?
Yes — counting uses real calendar dates, so all leap days in the range are included.