Date & Time Tool

Days Between Dates Calculator

Calculator

Count the days between two dates

Pick a start and end date — the difference is calculated instantly in your browser.
30
Days apart
From Saturday, September 19, 2026 to Monday, October 19, 2026 is 30 days.
0yr
1mo
0days

Duration In Other Units

4 + 2d
Weeks
1.0
Months (avg)
720
Hours
43,200
Minutes
2,592,000
Seconds
0.08
Years (avg)

Weekdays & Weekends

20
Weekdays (Mon–Fri)
10
Weekend days
4
Full weeks

Tool features

Count calendar days, weekdays and weeks between any two dates
4 features

Include/Exclude End Date

Count the span exclusive or inclusive of both endpoints

Weekdays & Weekends

Mon–Fri, weekend day and full-week counts across the span

Instant Live Result

Updates as you pick dates — no calculate button needed

Order-Independent

Swap dates any time; the span is always measured correctly

What is a date difference & how it works

Counting days correctly across months and leap years

Counting the days between two dates sounds simple until months of different lengths, leap years and the question of whether to count the end date come into it. Getting it wrong by one day matters for deadlines, notice periods, rentals and project plans.

This calculator counts calendar days between any two dates, in either order, and optionally includes the end date. It also breaks the span into weekdays and weekend days, full weeks, and approximate months and years, and converts it to hours, minutes and seconds.

Exclusive count
The default: 1 to 2 January is 1 day.
Inclusive count
Counts both start and end dates: 1 to 2 January is 2 days.
Weekdays
Monday to Friday only; public holidays are not excluded.

How to use this tool

Count the days between two dates in four steps
1
Pick the start date
Choose the first date of the period.
2
Pick the end date
Choose the second date; the order does not matter.
3
Decide on inclusive counting
Tick the option to count both the start and end day if your rule requires it.
4
Read the breakdown
See total days, weekdays, weekend days, weeks and the other units.

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Frequently asked questions

Common questions about counting days
5 Q&A

It depends on the rule. Durations such as age or elapsed time normally exclude it; things like hotel stays, leave or event days that count every calendar day usually include both ends.

Yes. The count uses real calendar dates, so 29 February is included in leap years.

No. Weekdays are Monday to Friday; holidays vary by country and are not removed. Subtract them yourself for working-day counts.

Months and years have different lengths, so a span of days does not convert to an exact number of them. The figures use average month and year lengths.

Subtract the dates, e.g. =B1-A1, in Excel or Google Sheets. For weekdays use =NETWORKDAYS(A1,B1), which counts both ends.