上班天数计算器
上班天数（Working Days）通常指周一至周五的工作日，不含周末。本工具可快速计算两个日期之间的工作天数，适用于项目排期、合同交货期、SLA响应期限及请假天数统计等业务场景。
工具语言：英文 · 按标准周一至周五计算 · 不含公共假期（如需按特定国家假期计算，请使用对应国家工作日计算器）
Pick two dates — get the exact number of Mon–Fri days between them. Weekends excluded, both dates inclusive.
After calculating, copy the result into your workflow instead of searching for the calculator again.
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No sign-up · No stored inputs · Copied text does not include your entered values
Formula
Business Days = Count of Mon–Fri days from Start Date to End Date (inclusive)
Every calendar day between the two dates is checked. If it falls on Monday through Friday, it is counted. Saturday and Sunday are always skipped.
Worked Example
Scenario 1 — SLA tracking:
A support ticket is raised on Monday 5 May. Your SLA requires a resolution within 5 business days.
Start: Monday 5 May • End: Friday 9 May = 5 business days
If the period crossed a weekend (Mon 5 May → Mon 12 May): the result is 6 business days — Saturday and Sunday are excluded.
Scenario 2 — Project sprint duration:
A two-week sprint runs from Monday 3 February to Friday 14 February.
Week 1: Mon–Fri = 5 days • Week 2: Mon–Fri = 5 days
Total: 10 business days
Scenario 3 — Payment terms check:
An invoice is issued on Friday 7 March under Net 30 business days terms. The due date falls on Thursday 17 April (30 business days later, skipping 8 weekend days).
For calendar-day Net 30 terms, use the Invoice Due Date Calculator instead — it handles both calculation methods.
Common Mistakes
- Forgetting that both dates are inclusive. Mon 1 May to Fri 5 May = 5 business days, not 4.
- Expecting public holidays to be excluded. This calculator only excludes weekends. For UK or EU bank holidays, use the regional calculators.
- Confusing calendar days with business days. A 30-calendar-day SLA is not the same as a 30-business-day SLA — the latter is roughly 6 weeks.
Guide
How to Use
- 1
Enter the start date
Select the first day of the period you want to measure.
- 2
Enter the end date
Select the last day. Both dates are included in the count.
- 3
Click Count Business Days
The tool counts every Mon–Fri between the two dates.
- 4
Copy your result
Use the copy button to paste into emails or project trackers.
Next Steps
What to do next
FAQ
Frequently Asked Questions
Related by Workflow
Country Working Days Calculators
UK Working Days
8 England & Wales bank holidays excluded
US Working Days
11 US federal holidays excluded
France Working Days
11 jours fériés excluded
Germany Working Days
9 nationwide public holidays excluded
Australia Working Days
National holidays incl. ANZAC Day excluded
South Africa Working Days
12 SA national public holidays excluded
Belgium Working Days
10 Belgian national holidays excluded
Working Days Europe
Multi-country EU working days tool
计算公式说明
工作天数 = 结束日期至开始日期之间的天数 − 周末天数
· 周末 = 周六 + 周日（不计入工作天数）
· 公共假期默认不排除（如需排除，请使用特定国家版本）
业务示例
场景：采购合同规定供应商须在签约后25个上班天数内完成发货，签约日期为2025年5月5日（周一）。
· 起始日期：2025年5月5日（周一）
· 加25个工作天（跳过周末：5月10/11、17/18、24/25、31/6月1日）
· 发货截止日 = 2025年6月9日（周一）
· 注：如该期间存在公共假期，实际可用工作天数将减少，建议与供应商确认。
按国家/地区计算工作日
如需按特定国家的公共假期计算工作日，请使用以下工具：
常见问题
上班天数和工作日的区别是什么？
两者通常含义相同，均指周一至周五的工作日，不含周末。部分场景下"工作日"还会排除法定公共假期，具体以合同或制度规定为准。
计算结果包含开始日和结束日吗？
本工具按标准计算两日期之间的工作天数，通常包含起始日，不含结束日。具体算法可参考工具内说明。
如何计算30个工作日后的日期？
输入起始日期，然后在"加减工作日"模式中输入30，工具会自动跳过周末，给出目标日期。
公共假期包含在内吗？
本工具默认不排除公共假期。如需按特定国家假期计算，请使用上方对应国家工作日计算器。
免责声明
计算结果仅供业务规划和参考使用，不构成法律或合同建议。工作日定义因合同和国家规定而有所不同，本工具默认按标准周一至周五计算，不含公共假期。