Days Between Dates Calculator
How many days are there between two dates? Enter a start and end date.
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days
Weeks
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Months
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Weekdays
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Weekend days
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How to count the days between two dates
The number of days between two dates is the end date minus the start date. From January 1 to December 31, 2026 that is 364 days. The start date is not counted, just like when you count nights in a hotel. When you need to count both the first and the last day, for example for a vacation, a notice period or a medication schedule, switch on "Include end date".
The result is also shown in weeks (full weeks plus days), in calendar months plus days, and in years, months and days for longer periods. Weekdays are Monday to Friday; for business days without public holidays, use the working days calculator.
Want to know which date it is a number of days from now? The date calculator adds or subtracts days, weeks or months.
Frequently asked questions
Should I include the end date? +
It depends on what you count. The difference between January 1 and December 31, 2026 is 364 days, but if you count both days (for example a stay, a contract or a holiday period) it is 365 days. Tick "Include end date" to add the end date to the count.
How many weeks are between two dates? +
Divide the number of days by 7. The calculator shows the result as full weeks plus remaining days, for example 23 weeks and 4 days, and as a decimal number of weeks.
How are months counted? +
Months are counted as calendar months from the start date: from March 10 to August 25 is 5 months and 15 days. When the start day does not exist in the target month (such as the 31st), the last day of that month is used.
How many working days are between two dates? +
The calculator shows the weekdays (Monday to Friday). To also exclude public holidays of the US, UK, Canada or Australia, use the working days calculator.