Business Days Calculator
Free business days calculator. Add business days to a date or count weekdays between two dates. Skips weekends. No signup.
What business days means
A business day is a working day — Monday to Friday — excluding weekends. Contracts, deliveries, payment terms, and settlement periods are usually quoted in business days rather than calendar days, which is why a “10-day” deadline can be almost two weeks away. This calculator adds business days to a date, or counts the business days between two dates.
How the calculator works
- Add mode: starting from the date you enter, it steps forward one day at a time, counting only Monday to Friday, until it has advanced the number of business days you asked for.
- Count mode: it counts every Monday-to-Friday date between two dates, inclusive, and swaps the dates if you entered them backwards.
- Count mode also reports calendar days and the weekend days inside the range, so the difference is visible.
- Public holidays are not excluded, because they vary by country and region.
A worked example
Starting on Wednesday 12 August 2026 and adding 10 business days:
| Question | Result |
|---|---|
| 10 business days after Wed 12 Aug 2026 | Wed 26 Aug 2026 |
| Calendar days taken | 14 |
| Weekend days skipped | 4 |
Ten business days is fourteen calendar days — the two weekends in between are not counted. In count mode, the range 12–26 August 2026 contains 11 business days across 15 calendar days, with 4 weekend days.
Where business-day counting is used
| Context | Typical rule |
|---|---|
| Invoice payment terms | Net 30 — often interpreted as 30 calendar days |
| Bank settlement | T+1 or T+2 business days after a trade |
| Contract deadlines | “Within 10 business days” of an event |
| Shipping estimates | Business days in transit, excluding weekends |
Notice the ambiguity: Net 30 usually means calendar days, while settlement and shipping usually mean business days. Check which one a contract intends before counting.
Common mistakes
- Assuming holidays are handled. They are not. Subtract public holidays that fall in the range for an exact figure.
- Treating a deadline as “days” when it says business days. A 10-business-day term is roughly two weeks, not ten days.
- Counting the start date twice. In count mode the range is inclusive, so a start and end on the same weekday registers one business day.
- Forgetting that the working week differs by country. The tool uses Monday to Friday; some regions work Sunday to Thursday.
Settlement and delivery windows
Settlement terms are quoted as a number of business days after a trade. Starting from Wednesday 12 August 2026, the windows land like this:
| Term | Settlement date |
|---|---|
| T+1 | Thu 13 Aug 2026 |
| T+2 | Fri 14 Aug 2026 |
| T+3 | Mon 17 Aug 2026 |
| T+5 | Wed 19 Aug 2026 |
T+3 jumps the weekend to the following Monday, which is exactly why business-day terms exist: they keep agreements away from days when banks and offices are shut.
Frequently asked questions
Are holidays counted as business days?
No holidays are excluded automatically, because they differ by country, state, and year. Count the business days here, then subtract any public holidays that fall inside the range.
How many business days are in a year?
A standard year has 260 weekdays (52 weeks × 5 days). Public holidays remove roughly 5–12 of those depending on where you are, leaving about 248–255 working days.
Does the calculator include the end date?
In count mode, yes — both the start and end dates are included if they are weekdays. In add mode, the result is the date on which the Nth business day lands.
How do I convert a deadline I was given?
Enter the starting date and the number of business days in add mode and read off the calendar date. If time zones are involved — a deadline in another country, for instance — the time zone converter helps with the boundary, and the age calculator handles plain calendar-date differences.