📅 Working Days Calculator 2026
Count business days between dates, add or subtract working days, exclude US federal holidays and weekends. Includes the complete 2026 US holiday calendar, working days per month table, salary & productivity formulas, and international workweek comparisons.
🗓️ Business Days Calculator
Calculate Business Days Between Two Dates
Add Working Days to a Date
Subtract Working Days from a Date
📖 How to Use This Working Days Calculator
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1Choose Your Calculation Mode
Select "Days Between" to count business days in a range, "Add Work Days" to find a future deadline date, or "Subtract Work Days" to find a past date. All modes update in real-time as you change inputs.
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2Enter Your Dates
Use the date pickers to select start and end dates (for "Days Between") or just a start date and a number of days (for Add/Subtract). Today's date is pre-loaded for convenience.
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3Configure Weekend & Holiday Options
By default, Saturdays and Sundays are excluded (standard Mon–Fri workweek). Check "Include Saturdays" or "Include Sundays" for 6- or 7-day workweeks. "Exclude US Federal Holidays" removes all 11 US holidays from the count.
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4Read the Detailed Result
The green result panel shows: total working days, total calendar days, weekends excluded, holidays excluded, equivalent work weeks, and total work hours (at 8 hours/day standard).
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5Copy the Result
Click "📋 Copy Result" to copy the output to clipboard — ready to paste into emails, contracts, spreadsheets, or project management tools like Jira, Asana, or Monday.com.
🇺🇸 2026 US Federal Holidays
📊 Working Days Per Month — 2026 (US)
| Month | Total Days | Weekend Days | Holidays | Working Days | Work Hours (8h) |
|---|
📐 Working Days — Mathematical Formulas & Algorithms
\( W = \sum_{d=d_{\text{start}}}^{d_{\text{end}}} \mathbf{1}[\text{dow}(d) \notin \text{Weekend}] \cdot \mathbf{1}[d \notin \text{Holidays}] \)
\( \text{Approximate (for ranges spanning full weeks):} \)
\( W \approx \Bigl\lfloor \frac{N \cdot 5}{7} \Bigr\rfloor - H \qquad \text{where } N = \text{total calendar days},\; H = \text{holidays on weekdays} \)
\( \text{Exact formula (Zeller variant):} \quad W = 5 \left\lfloor \frac{N}{7} \right\rfloor + \min\!\left(n_r,\,5\right) - \max\!\left(0,\, n_r + n_s - 7\right) - H \)
\( \text{Calendar days} = 365 \text{ (non-leap year)} \qquad 366 \text{ (leap year)} \)
\( \text{Weekend days} = 2 \times 52 = 104 \quad \text{(some years: 105-106)} \)
\( \text{US Federal Holidays on weekdays} \approx 10\text{–}11 \text{ per year} \)
\( \text{Working days (US, typical)} = 365 - 104 - 10 = \mathbf{251} \text{ days} \)
\( \text{Working hours/year} = 251 \times 8 = \mathbf{2{,}008\,h} \quad \text{(standard 8h/day)} \)
\( \text{Work weeks} = 251/5 = \mathbf{50.2} \text{ weeks} \)
\( \text{Daily rate} = \frac{\text{Annual salary}}{W_{\text{year}}} \qquad \text{(e.g., \$80{,}000 / 251 = \$318.72/day)} \)
\( \text{Hourly rate} = \frac{\text{Annual salary}}{W_{\text{year}} \times h} \qquad \text{(e.g., \$80{,}000 / 2{,}008 = \$39.84/h)} \)
\( \text{Pay for period} = \frac{\text{Annual salary}}{W_{\text{year}}} \times W_{\text{period}} \)
\( \text{FLSA overtime rate} = 1.5 \times \text{regular hourly rate} \qquad \text{(>\,40\,h/week)} \)
💼 What Are Working Days, Business Days & Calendar Days?
A working day (also called a business day) is any day on which normal business is conducted — conventionally Monday through Friday, excluding public holidays. The distinction between working days and calendar days is seemingly minor but has significant legal, financial, and contractual implications.
When a contract says "delivery within 5 business days," that language was deliberately chosen over "5 calendar days" to give a clearer, legally enforceable timeline that accounts for weekends and bank closures. If you sign a contract on a Friday, "5 calendar days" expires the following Wednesday; "5 business days" expires the Friday of the following week. That's a three-day difference — potentially worth thousands of dollars in late-delivery penalties.
Calendar Days
Every day from Sunday to Saturday, including holidays. Used in: rental agreements (30-day notice), visa stays, insurance waiting periods, and government response timeframes. "Within 30 calendar days" is unambiguous — count every single day.
Business / Working Days
Monday–Friday only, excluding public holidays. Used in: contracts ("5 business days to respond"), shipping estimates, legal/court filing deadlines (court days), banking settlement (T+2), and employment (annual leave calculations). The most common professional time measurement.
Banking Days
Specifically: days when the Federal Reserve operates. Identical to business days in most cases. ACH (electronic transfer) settlement takes 1–3 banking days. Wire transfers: same-day if submitted before cut-off (typically 5–6 PM ET). Checks: 1–2 banking days for local, 5 for remote.
Court / Legal Days
Days courts are open — weekdays excluding court holidays (which may differ from federal holidays). Under Federal Rules of Civil Procedure Rule 6: if a deadline falls on a Saturday, Sunday, or holiday, the next business day applies. State courts may have different rules. Always verify with your jurisdiction's court calendar.
🌍 International Working Day Conventions
| Country / Region | Standard Workweek | Days Off | Typical Working Days/Year | Notes |
|---|---|---|---|---|
| USA / Canada | Mon – Fri | Sat, Sun | ~251–253 | 11 US federal, 10 Canadian federal holidays |
| United Kingdom | Mon – Fri | Sat, Sun | ~253 | 8 Bank Holidays (England/Wales); Scotland varies |
| Germany | Mon – Fri | Sat, Sun | ~249–252 | 9–13 public holidays (varies by state/Bundesland) |
| France | Mon – Fri | Sat, Sun | ~228 | 11 national holidays; 35-hour work week law (Aubry law) |
| India | Mon – Sat | Sun only | ~300 | Varies by state; many private firms use Mon–Fri + 2nd/4th Sat |
| UAE / Saudi Arabia | Mon – Fri | Sat, Sun | ~248 | UAE shifted from Sun–Thu to Mon–Fri in 2022 |
| Israel | Sun – Thu | Fri, Sat | ~250 | Shabbat (Friday sunset – Saturday night) is rest day |
| Japan | Mon – Fri | Sat, Sun | ~245 | 16 national holidays; "Golden Week" cluster in May |
| China | Mon – Fri | Sat, Sun | ~249 | 7 national holidays; some holidays have compensatory workdays on weekends |
| 4-Day Week (Pilot) | Mon – Thu | Fri, Sat, Sun | ~200 | UK 2022 pilot: 92% of firms retained 4-day model. Iceland, Belgium experimenting. |
🛠️ When Do You Actually Need to Count Working Days?
Shipping & Logistics
Carriers quote 1–5 business day shipping estimates. If you order Thursday and standard is "3 business days": skip Fri (day 1), Mon (2), Tue (3) → arrives Tuesday. Order Friday: Mon (1), Tue (2), Wed (3) → arrives Wednesday — not Monday as many mistakenly assume.
Project Management
Sprint planning, Gantt charts, and project deadlines use working days (not calendar days). A 10-business-day project starting Monday ends on the following Friday — 14 calendar days. Microsoft Project and Jira both calculate durations in working days by default. This calculator gives the same output without needing import/export.
Financial Settlement (T+2)
Stock market trades in the US settle on T+2 (trade date + 2 business days). If you sell shares on Wednesday, you receive cash on Friday. If you sell on Thursday, cash arrives Monday (not Saturday). Bond settlement: T+1. US Treasury bills: T+1 from 2024 (SEC rule 15c6-2).
Legal & Regulatory
Court filing deadlines, tax filing deadlines, GDPR data breach notifications (72 hours = 3 business days), FMLA notices, employment termination notice periods, and consumer complaint response times all use business day counts. Errors cost money and legal standing.
Leave & HR Planning
Annual leave (PTO) is in business days, not calendar days. A "week's vacation" Dec 23–27 = 3 working days (Dec 25 = holiday). Annual leave accrual is often stated as days per working year (e.g., 15 business days = 3 work weeks). HR professionals need working-day counts for pro-rata calculations on partial-year employment.
Construction & Contracts
Construction contracts often specify "substantial completion within X business days." Government contracts (FAR - Federal Acquisition Regulation) specify payment within 30 calendar days (Prompt Payment Act) but use business days for invoicing and response deadlines. Public comment periods (e.g., EPA, FCC) typically use calendar days.