Business Days Calculator: Add 5 or 10 Business Days
Add or subtract business days, find the date in 5 or 10 business days, or count workdays between dates with optional 2026 holiday calendars.
How to use Business Days Calculator: Add 5 or 10 Business Days
Add or subtract business days, calculate a 5–10 business-day window, or count eligible days between two dates. Weekends are excluded, with optional 2026 Korean or US federal holiday calendars.
Displayed values follow the definitions stated above.
Calculation references
This tool was implemented against these primary public sources.
2026년 월력요항·한국천문연구원 →관공서의 공휴일에 관한 규정 →미국 OPM 연방 공휴일 →Five or ten business days depends on the start rule and holidays
Delivery, refund, banking and contract timelines use business days rather than calendar days. To find the actual date, skip weekends and the applicable holidays, and confirm whether the triggering date counts as day one.
The default excludes the start date. The 2026 Korea and US presets also exclude the published holidays in that calendar.
Recommended steps
- Choose add, subtract, count-between, or the 5–10 business-day window.
- Enter the base date and confirm whether the start date counts.
- Select the 2026 holiday calendar that matches the organisation handling the deadline.
How to interpret the result
- With no holiday, five business days after a Friday normally lands on the following Friday when the start is excluded.
- Banks, courts, carriers and private employers can observe calendars different from federal or government-office holidays.
- Outside 2026, the preset cannot verify holidays and the result displays a range warning.
Frequently asked questions
How long is five business days?
It is often about seven calendar days without a holiday, but the starting weekday and start-day rule can change the result.
Is ten business days two weeks?
It is usually 14 calendar days when counting from the next day and only weekends are excluded. A holiday makes the date later.
Are public holidays excluded?
Choose the 2026 Korea or US federal preset to exclude its listed holidays. Confirm company, bank, state and local closures separately.