Count calendar days between two dates, including weeks, weekdays and weekend days, with optional inclusive counting.
Calendar-day differences, business-day counting, days-until questions and date arithmetic.
Enter any start and end date. The calculator shows calendar days, full weeks, weekdays and weekend days. Choose Inclusive if both the start date and end date should count.
January 1 to January 2 is one day apart using standard date subtraction. Inclusive counting treats both dates as counted calendar dates, so the count is two.
The weekday result counts Monday through Friday and the weekend result counts Saturday and Sunday. It does not automatically exclude holidays. For workday calculations that can account for holiday rules, use the business days calculator.
Convert the span to weeks between dates, months between dates, or use the add or subtract days calculator to move forward or backward from a date.
Subtracting October 1 from October 11 gives 10 elapsed calendar days. Choose inclusive counting to count both October 1 and October 11, which produces 11 days.
The difference between two dates is not always the same as the number of dates included in a booking, schedule, or attendance period.
Weekdays exclude Saturday and Sunday, but not public holidays. For working-day calculations, use the business-day tool.
Continue with: Business Days Calculator · Weeks Between Dates Calculator
Standard mode does not. Choose inclusive mode when both endpoint dates should count.
Yes. The calculator uses the absolute difference and works if the earlier date is entered second.
See how formulas, sources and limitations are handled across ERICH Calculators.