Business Days Calculator
Count the working days between two dates, or add business days to a date to find a deadline or delivery date.
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Two ways to calculate
Count the business days between a start date and an end date, or add or subtract a number of business days to land on a deadline, delivery date or notice date.
Your weekend, your holidays
Pick which days of the week are not worked, such as Friday and Saturday, tick the US federal holidays you observe, and add company or regional days off of your own.
See what was left out
Every result shows how many weekend days were skipped and lists each holiday that was removed, by date and name, so you can check the count rather than take it on trust.
How to count business days between two dates
- 1
Choose Business days between two dates, or Add or subtract business days.
- 2
Enter the two dates, or a start date and the number of business days.
- 3
Tick the weekend days that are not worked, then add US federal holidays or days off of your own.
- 4
Read the result and the list of holidays left out, then copy it.
What people use this tool for
- Work out a delivery or shipping date quoted in business days.
- Count the working days left before a project deadline.
- Find the last day of a notice, payment or response period.
- Check how many working days a period of leave will use.
Frequently Asked Questions
What counts as a business day?
A business day is a day that is neither a weekend day nor a holiday. By default the weekend is Saturday and Sunday. You can change the weekend days and choose which holidays to leave out, because the definition varies by country, employer and contract.
Does the count include the start date and the end date?
You decide. Both dates are counted by default, so Monday to Friday of the same week is 5 business days. Clear Count the start date to count only the days after it, which is how most "within N business days" deadlines are measured, or clear Count the end date to stop the day before.
How does adding business days work?
The start date is not counted. Adding 1 business day to a Friday gives the following Monday, and adding 5 business days to a Monday gives the Monday after. Subtracting works the same way in reverse. Adding 0 returns the start date unchanged, even if it falls on a weekend. This matches the WORKDAY function in spreadsheets.
Which US federal holidays are included?
All eleven: New Year's Day, Birthday of Martin Luther King, Jr., Washington's Birthday, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day and Christmas Day. Untick any that your workplace does not observe. Dates are calculated from the rules in federal law for 1971 onward, with Juneteenth from 2021.
What happens when a holiday falls on a weekend?
The federal list uses the observed date: a holiday on a Saturday is observed on the Friday before, and one on a Sunday on the Monday after. For example, Independence Day 2026 falls on a Saturday and is observed on Friday, July 3. A holiday that lands on one of your weekend days is not subtracted twice.
Can I use it for holidays outside the United States?
Yes, by adding the dates yourself. Enter each public or company holiday with an optional name and it is left out of the count. Only the US federal list is built in, because holidays elsewhere often depend on the region or are announced each year.
Is this the same as a bank or shipping business day?
Not always. Banks, courts, carriers and stock exchanges publish their own calendars and cut-off times, and some states and employers add or skip holidays. Treat the result as a careful count and check the calendar that governs your deadline, especially for legal or payment dates.
Are my dates stored anywhere?
No. The calculation runs in your browser and nothing is uploaded. The dates and holidays you enter are cleared when you leave or reload the page.