Date Difference Calculator
100% PrivateCalculatorsCount the exact days, weeks and months between two dates.
Runs entirely in your browser. Your input is not uploaded to Ovatly or anywhere else.
The order of the two dates does not matter; the span is counted the same either way. Business days skip Saturdays and Sundays only; public holidays are not deducted.
- 1Enter the start date.
- 2Enter the end date (the order of the two does not matter).
- 3Tick the include option if the end date itself should count as a full day in the span.
- 4Read the days, weeks and business days in the result panel.
The span is 30 days, which is 4 weeks and 2 days. Counting Monday to Friday days in the span gives 21 business days. Because 31 January 2026 is a Saturday, ticking 'include the end date' raises the total to 31 days while the business-day count stays at 21.
- Business days skip Saturdays and Sundays only. Public holidays differ by country and are not deducted.
- Dates are treated as whole calendar days; times of day are not involved.
- The default count excludes the start date, matching how most deadline and duration rules are written.
By default the calculator counts the days between the dates, so 1 January to 2 January is 1 day. Tick 'include the end date' if your span counts both the first and last day.
About this tool
The Date Difference Calculator counts the exact span between two dates: total days, whole weeks, and business days with weekends skipped. It is the dependable way to work out notice periods, deadlines, rental spans and project timelines without counting calendar squares.
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Part of Ovatly's free tools in Calculators.