Inclusive Date Difference
Days between two dates, counting both ends
The count that includes the first day and the last — what a hotel bill, a jury summons, a sick note or a "within 30 days" clause almost always means.
Questions people ask
The things that come up about inclusive date differences, answered plainly.
When should I count inclusively?
Whenever the days themselves are the thing being counted — days of leave taken, nights charged, days of a festival. Count exclusively when you are measuring the distance to a deadline.
Is a week seven inclusive days or eight?
Monday to the following Monday is seven days exclusive and eight inclusive. A working week — Monday to Friday — is five inclusive days, which is why leave is nearly always counted this way.
Related tools
How far apart two instants are — in whichever unit you need, counting every day or only the working ones.
Days Between DatesA plain day count, with the weekday split beside it and the inclusive answer stated too — because half the time "days between" means one more than subtraction gives.
Business Days CalculatorNon-working days out, your own public holidays out, and every removed day listed — so you can see exactly what the count is made of rather than trusting a number.
Date Difference CalculatorThe difference, the duration, the interval — the same question under three names. Enter two dates and get the gap in every unit at once: years, months and days as a person would say it, and the exact totals underneath.
Time Difference CalculatorTwo clock times or two full timestamps, and the difference in hours, minutes and seconds — including the overnight case, where the end time is smaller than the start.