以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Choose to count business days or to add business days.
- Enter the dates (and the number of days to add, if applicable).
- Choose which days are the weekend. Some countries use Friday–Saturday.
- Optionally list public holidays as YYYY-MM-DD dates to exclude them.
計算式
Every full week contributes the same number of working days; the remaining days are checked one by one, and listed holidays that fall on working days are subtracted.
Business days = calendar days − weekend days − holidays on weekdays
Example
- Monday 2 November to Friday 13 November 2026, both included: 12 calendar days.
- Minus 2 weekend days = 10 business days.
よくある質問
Are public holidays included automatically?
No. Holidays differ by country, region and employer, so you list the ones that apply. This keeps the calculation correct for any location.
Is the start date counted?
When counting, the start date is included. Tick 'include end date' to include the end date as well. When adding business days, counting starts the day after the start date.
How do I count working days with a different weekend?
Choose Friday–Saturday or Sunday only in the weekend setting.