Business Day Calculator
Count the working days between two dates, or add and subtract business days from any date. Weekends and your own holidays are skipped automatically.
No holidays added. Only holidays that fall on a working day change the result.
Business Day Calculator: Count Working Days Between Two Dates
This free business day calculator shows how many working days fall between two dates, or what date you reach after adding or subtracting a number of business days. It skips weekends automatically and lets you add holidays, so the answer matches the real calendar your business, bank, court or shipping partner follows.
Use it for delivery estimates, invoice due dates, notice periods, legal deadlines, project plans and anything else that is measured in working days instead of calendar days.
How to Use the Business Day Calculator
- Pick a mode. Choose Business days between dates to count working days, or Add or subtract business days to find a new date.
- Enter the start date. Tap Use today to fill in the current date.
- Enter the end date, or the number of business days you want to add or subtract.
- Choose which days count as the weekend. Saturday and Sunday is the default.
- Add any holidays that should be skipped, one date at a time, or load the US federal holidays with one tap.
- Read the result instantly, then use Copy result to save it.
Everything runs in your browser. The dates you enter are not stored or sent to a server.
What Is a Business Day?
A business day is a day on which normal business is carried out. In most countries that means Monday to Friday, excluding public holidays. Weekends and official holidays are non-business days, which is why a "5 business day" delivery can take a full week or more.
The exact definition depends on where you are. Some countries in the Middle East use a Sunday to Thursday week, so the weekend setting in this business day calculator lets you switch to Friday and Saturday, or to a single weekend day.
How Business Days Are Calculated
The calculator checks every date in the range one by one. A date counts only if it is not a weekend day and not on your holiday list. A holiday that lands on a weekend is not subtracted twice.
Include the End Date or Not?
By default the count includes both the start date and the end date, the same way the Excel NETWORKDAYS function works. Monday to Friday of the same week is 5 business days.
If you prefer to count only the nights or the elapsed time, untick Include the end date in the count. Monday to Friday then returns 4. When you add or subtract business days, the start date itself is never counted, so adding 1 business day to a Friday gives the following Monday.
Business Day Calculator Examples
| Start date | End date or change | Holidays | Result |
|---|---|---|---|
| 1 Dec 2026 | 15 Dec 2026 | None | 11 business days |
| 2 Nov 2026 | 30 Nov 2026 | None | 21 business days |
| 1 Dec 2026 | 31 Dec 2026 | 25 Dec | 22 business days |
| 2 Nov 2026 | Add 10 business days | None | 16 Nov 2026 |
| 21 Dec 2026 | Add 5 business days | 25 Dec | 29 Dec 2026 |
| 1 Jan 2026 | 31 Dec 2026 | None | 261 business days |
How to Add Business Days to a Date
To add business days, move forward one calendar day at a time and count only the days that are not weekends or holidays. Stop when the count reaches the number you entered. The date you land on is always a business day.
For example, adding 10 business days to Monday, 2 November 2026 lands on Monday, 16 November 2026, because two weekends are skipped on the way. Choose Subtract to count backward in the same way, which is useful for finding when something had to be ordered or filed.
Business Days vs. Working Days vs. Calendar Days
- Calendar days: every day of the week, including weekends and holidays.
- Business days: Monday to Friday, excluding public holidays. Banks, courts and carriers often use this term.
- Working days: usually the same as business days, but it can also mean the days an individual employee actually works. Always check the definition in your contract.
When a deadline says "within 30 days", it normally means calendar days. When it says "within 30 business days", the weekends and holidays are left out, and the real calendar time is closer to six weeks.
Where to Use a Business Day Calculator
- Shipping and delivery: estimate when an order will arrive when the carrier quotes transit time in business days.
- Invoices and payments: work out due dates for terms like "net 15 business days" and see when a bank transfer will clear.
- Legal and compliance: calculate response periods, filing deadlines and cooling-off periods.
- HR and payroll: measure notice periods, probation, leave and the number of working days in a pay period.
- Project planning: turn a number of working days into a realistic delivery date for a team.
- Visas and applications: check processing times that are quoted in business days.
Tips for Accurate Business Day Counts
- Add every public holiday that applies to your country, state or company. Holiday calendars differ from place to place.
- Check how the person who set the deadline counts the first and last day, and tick or untick the end date option to match.
- Remember that a holiday that falls on a weekend does not remove an extra working day.
- Use the same weekend setting as the other party. A supplier in a Friday and Saturday weekend country will count differently from you.
- Treat the US federal holiday button as a starting point and check it against your own calendar, since employers and banks may observe different days.
Frequently Asked Questions
How do I calculate business days between two dates?
Count every day in the range and leave out Saturdays, Sundays and holidays. The business day calculator above does it for you when you enter the start and end dates.
Does the business day calculator include holidays?
It skips any holiday you add to the list. You can enter dates one by one or load the US federal holidays. Public holidays differ by country, so add the ones that apply to you.
How many business days are in a year?
Most years have 260 or 261 weekdays. Subtract your local public holidays to get the number of working days. For example, 2026 has 261 weekdays before holidays.
Are Saturdays business days?
Usually not, but it depends on the country and the business. This calculator lets you pick the weekend days, so you can treat Saturday or Sunday as a working day if that is how your business operates.
How do I find the date 10 business days from today?
Choose the Add or subtract tab, tap Use today, enter 10 and keep Add selected. The result shows the exact date and weekday after skipping weekends and holidays.
Is this business day calculator free to use?
Yes. It is free, needs no sign-up, works on phones, tablets and computers, and runs entirely in your browser.
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