Add Business Days to a Date (Excluding Weekends)
Adds business days to a start date while skipping Saturdays and Sundays; shows the resulting date, its weekday and the calendar days in between.
Things to keep in mind:
- Public holidays are not removed automatically; move the result one business day forward for each holiday in between.
- For businesses or contracts that count Saturday as a working day the result differs.
Calculator
Result
Enter the values and press Calculate to see the result here.
About this tool
Delivery times, shipping promises, bank transactions and "within X business days" clauses are counted differently from calendar days: Saturdays and Sundays do not count. This tool adds any number of business days to a date and finds the resulting day. To count the business days between two dates, use the business days between dates tool; both use the same counting rule.
Formula
The start day is not counted; the first business day is the first Monday–Friday after the start. If the start is on a weekend, the previous Friday is used as the base.
- d = position of the start in its week (Monday 0 … Friday 4)
- t = d + business days to add
- full weeks = ⌊t ÷ 5⌋, remainder = t − 5 × full weeks
- Result = Monday of the start week + 7 × full weeks + remainder
Example
Wednesday 14 October 2026 + 10 business days: d = 2, t = 12, full weeks = 2, remainder = 2 → Monday of the start week (12 October) + 14 + 2 days = Wednesday 28 October 2026. That spans 14 calendar days, 4 of them weekend days.
Friday + 1 business day is Monday, and Saturday + 1 business day is also Monday.
How to read the result
The result is the n-th business day after the start. Public holidays are not business days, but the tool does not remove them automatically: move the result one business day forward for each public holiday in between. Legal periods are usually counted in calendar days; use the legal deadline tool for those.
How to use
- Enter the start date (this day is not counted).
- Enter the number of business days to add.
- Read the resulting date and weekday; move it forward for any public holidays in between.
Notes
Counting uses the interval (start, result]: the start day is excluded and the result day included. Only Saturday and Sunday are skipped; public and religious holidays count as business days. Weekdays: 1 = Monday … 7 = Sunday.
Frequently asked questions
It depends on the start day, but because weekends are skipped it is usually 14 calendar days. For example, Wednesday + 10 business days is the Wednesday two weeks later.
No. Today + 1 business day means tomorrow (if it is a weekday). This is the same rule as the tool that counts business days between two dates: start excluded, end included.
The first business day is the following Monday. A 1-business-day period starting on Saturday or Sunday ends on Monday, a 5-business-day period on Friday.
Religious holiday dates change every year and practices differ between institutions. Instead of an unreliable calendar the tool skips weekends only; you can add holidays in between yourself.
Next step
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