Business Days Calculator
Count business days and calendar days between two dates, with a configurable workweek and your own holiday list. Inclusive behaviour is explicit.
One YYYY-MM-DD date per line, or separated by commas. These are yours alone — no holiday calendar is built in.
How it works
- Choose whether to count business days between two dates, or to find the date a number of business days away.
- Adjust the working week and add your own holiday dates if you need them.
- Inclusive or exclusive counting is your choice, and the result always states which was used.
Frequently Asked Questions
Are the start and end dates counted?
Both are counted by default, and you can switch either off. Inclusive versus exclusive counting is the most common source of off-by-one disagreements, so the setting is always shown in the result rather than assumed.
Are public holidays included?
Only the ones you enter. There is no holiday database and no holiday API call: holidays vary by country, region and year, and a built-in list would be silently wrong for most people. Dates you add are excluded only when they fall on a working day.
Can I use a workweek other than Monday to Friday?
Yes. Any combination of weekdays can be selected, including a Sunday-to-Thursday week or a single working day.
Is daylight saving handled?
Yes. Counting is done in whole calendar days rather than by adding 24-hour blocks, so a clock change cannot shift the result by a day.