営業日計算ツール

祝日を除いた日付間の営業日を計算

最終確認： 2026年2月精度確認済み

ブラウザで計算 — データは保存されません

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日付と時間

📅日付計算機 📆日数計算 ⏱️時間の長さ計算機 🕐時刻計算機 💼営業日計算ツール 📋営業日計算機 📅曜日計算機 📊週番号計算機 🏛️ローマ数字変換 🎂年齢計算機 ✨日付パターン計算機 ⏳カウントダウン計算ツール 🌍タイムゾーン変換ツール 🤝会議プランナー 🌅日の出・日の入り計算ツール 🌙月齢計算ツール

Start Date

End Date

Include end date in calculation

Exclusion Mode

Exclude weekends & federal holidays

Standard business days

Exclude weekends only

Count holidays as working days

Exclude federal holidays only

Include weekends

Include all days

Calendar days only

Custom

Choose which days to exclude

Holiday Set

Add Custom Holidays (optional)

US Federal Holidays (2026)

• New Year's Day - Jan 1

• MLK Jr. Day - 3rd Mon in Jan

• Presidents' Day - 3rd Mon in Feb

• Memorial Day - Last Mon in May

• Juneteenth - Jun 19

• Independence Day - Jul 4

• Labor Day - 1st Mon in Sep

• Columbus Day - 2nd Mon in Oct

• Veterans Day - Nov 11

• Thanksgiving - 4th Thu in Nov

• Christmas - Dec 25

* When a holiday falls on Saturday, it's observed on Friday. When it falls on Sunday, it's observed on Monday.

出典と方法論

公式： Business Days = Total Days - Weekends - Holidays

Excludes Saturdays, Sundays, and federal holidays

出典： US Federal Holiday Schedule

完全な方法論と精度テストを表示

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How to Calculate Business Days Between Dates

The Business Days Calculator counts working days between two dates, automatically excluding weekends (Saturday and Sunday) and optionally US federal holidays. This is essential for project planning, contract deadlines, payroll processing, and shipping estimates.

What Are Business Days?

Business days (also called working days or weekdays) typically refer to Monday through Friday when most businesses operate. Our calculator excludes weekends by default and can optionally exclude US federal holidays like New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas.

Common Use Cases

Contract deadlines: "Payment due within 30 business days"
Shipping estimates: "Ships within 3-5 business days"
Legal deadlines: Court filings and response periods
Project planning: Realistic work timelines
Payroll: Processing time for direct deposits

Calendar Days vs Business Days

A 30-day period contains roughly 21-22 business days depending on weekend placement. A "30 business days" deadline is approximately 6 weeks of calendar time. Use our days between dates calculator for total calendar days.

Related Date Calculators

Add business days to a date with our business date calculator. Plan events with the countdown calculator or schedule across time zones with the meeting planner.