This calculator counts the exact number of days between any two dates and also expresses the gap in weeks, months, years and years-months-days. It shows how many of those days are business days (Monday to Friday) and how many fall on weekends, which helps with delivery times, notice periods and project deadlines.
Use it to find how many days are left until a holiday, exam, wedding or due date, how long ago something happened, how many working days a contract runs, or the length of a stay. You can choose whether the end date itself is counted, which matters for things like hotel nights versus rental days.
How to use the Days Between Dates tool
- Pick the start date (it defaults to today).
- Pick the end date.
- Tick Include the end day if both the first and last day should be counted.
- Read the total days and the breakdown in years, months and days.
- Check weeks, business days and weekend days in the boxes below.
Why use ToolOrca Days Between Dates
- Exact day count between any two dates
- Years, months and days breakdown
- Business days (Mon–Fri) and weekend days
- Option to include the end day
- Swap dates and “start = today” shortcuts
- Leap years handled automatically
How days between dates are counted
The calculator converts both dates to day numbers and subtracts them, so leap days and different month lengths are handled exactly. By default the start day is counted and the end day is not, which is the usual way to measure a gap: from Monday to Tuesday is 1 day. Ticking “include the end day” adds one, which is what you want when counting days of an event or a hotel stay including departure day.
Worked example: from 1 March 2026 to 30 June 2026 is 121 days, or 122 days if the end day is included. That is 17 weeks and 2 days, and 87 of the 122 days are business days (Monday to Friday).
Business days and holidays
Business days skip Saturdays and Sundays but do not know about public holidays, which differ by country and region. To get working days, subtract any public holidays that fall on a weekday within your range. For example, the whole year 2026 has 261 weekdays; a country with 10 weekday public holidays has 251 working days.
Frequently asked questions
How many days are there between 1 January and 31 December?
In 2026, from 1 January to 31 December is 364 days, or 365 days if you include the end day. In a leap year such as 2028 it is 365 days (366 with the end day).
How many days until Christmas?
Set the start date to today and the end date to 25 December. For example, from 13 November 2026 to 25 December 2026 is 42 days, of which 30 are weekdays.
Should I include the end date?
Include it when you count calendar days that something lasts, such as a 3-day conference from Monday to Wednesday. Leave it out when you measure the time between two moments, such as nights in a hotel or the age of something.
How many weeks are 100 days?
100 days is 14 weeks and 2 days, or about 3.3 months (using an average month of 30.44 days).
Does the business day count include public holidays?
No. It counts Monday to Friday only. Subtract the public holidays in your country that fall on weekdays in the range.