A working days calculator counts the business days between two dates by including every weekday and skipping every Saturday and Sunday. Enter a start date and an end date below and the tool reports the total calendar days, the working days from Monday to Friday, and the weekend days in between, all calculated in your browser.
What Business and Working Days Are
A business day, also called a working day, is a day on which most offices, banks, and government services are open. In most of the world that means Monday through Friday. Saturday and Sunday are weekend days and are not counted as working days. The distinction matters because many deadlines, delivery estimates, and payment terms are written in business days rather than calendar days, so a five business day window can span seven or more calendar days once a weekend falls inside it.
How to Use This Working Days Calculator
- Pick the start date of your range using the first date field.
- Pick the end date using the second date field.
- Leave the include end date box checked to count the final day, or uncheck it to count up to but not including it.
- Read the result: working days appear as the large number, with total calendar days and weekend days listed below.
- If your country observes public holidays inside the range, subtract any that land on a weekday.
How the Calculation Works
The tool steps through every date from the start to the end one day at a time. For each date it checks the day of the week. Saturday and Sunday are added to the weekend total, and every other day is added to the working days total. The total calendar days is simply the count of all days in the range. Whether the end date itself is counted depends on the include end date setting, which lets you match either an inclusive count, such as a stay that includes checkout day, or an exclusive count, such as the gap between two events.
Worked Example
Suppose you start a task on a Monday and the end date is the Friday of the following week, with the end date included. The range covers twelve calendar days. Two of those are a Saturday and Sunday, which leaves ten working days.
| Date range | Calendar days | Weekend days | Working days |
|---|---|---|---|
| Mon to Fri, same week | 5 | 0 | 5 |
| Mon to next Mon | 8 | 2 | 6 |
| Mon to Fri, next week | 12 | 2 | 10 |
Common Use Cases
Translate a deadline written in business days into a real calendar date by counting forward and skipping weekends.
Check whether a response or resolution fell inside an SLA measured in working days rather than clock time.
Count the working days in a period to prorate salary, calculate day rates, or set net payment terms.
Last Thoughts on Counting Working Days
Working days look simple until a weekend or a holiday lands in the middle of a range and a calendar count no longer matches what a contract or a delivery promise actually means. Counting business days by hand is slow and easy to get wrong, especially across several weeks. A calculator that walks the range and removes the weekends gives you a reliable number in one step, and the include end date toggle lets you match the exact way your deadline is written.
Use the result as your weekday baseline, then subtract any public holidays your country observes on a weekday. For related date math, try our date duration calculator for the full gap between two dates, the timezone converter when a deadline crosses regions, and the unix timestamp converter for working with machine dates. Browse the rest of our free online tools.
Key Takeaways:
- Working days, or business days, are Monday through Friday; Saturday and Sunday are weekend days.
- The calculator counts every day in your range and removes the weekends to give the working days total.
- The include end date toggle switches between an inclusive count and an exclusive count.
- Public holidays vary by country and are not removed automatically; subtract any weekday holidays yourself.
- If the end date is earlier than the start date, the tool swaps them so the count is still correct.
- Everything runs in your browser, so no dates are sent to a server.
Frequently Asked Questions (FAQs)
What counts as a working day?
A working day, also called a business day, is any day from Monday through Friday. Saturday and Sunday are weekend days and are not counted. This is the standard most offices, banks, and contracts use when they state a deadline in business days.
Does this calculator exclude public holidays?
No. It removes weekends only, because public holidays differ from one country and region to the next. If a holiday falls on a weekday inside your range, subtract it from the working days total to get the true count for your location.
Is the end date included in the count?
That is your choice. Leave the include end date box checked for an inclusive count that includes the final day, or uncheck it for an exclusive count that stops the day before. Use whichever matches the way your deadline or period is defined.
What happens if the end date is before the start date?
The calculator swaps the two dates so the range always runs forward, then counts the working days as normal. A note in the result tells you the swap happened, so the number you see is still accurate.
How is the number of working days calculated?
The tool steps through every date in the range one day at a time and checks the day of the week. Saturdays and Sundays are added to the weekend total, and every other day is added to the working days total, so the result reflects each actual date rather than an estimate.
Are my dates sent to a server?
No. The entire calculation runs inside your browser, so the dates you enter never leave your device. You can confirm this by disconnecting from the internet and watching the tool still work.
