Working Days Calculator
Count business days between two dates.
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This tool processes everything locally in your browser. Nothing is uploaded to a server.
📝 About Working Days Calculator
The Workday Calculator counts how many weekdays (Monday to Friday) and weekend days (Saturday and Sunday) fall between a start date and an end date. Results update immediately, and a checkbox lets you choose whether the end date itself is included in the count.
It is useful for estimating project timelines, counting the working days in a pay period, planning leave, checking a delivery promise of “10 business days,” or comparing how many working days different months contain.
The tool walks through every day in the range and sorts it by day of the week. If you pick the dates in reverse order, it swaps them automatically. Note that it excludes weekends only: public holidays such as Lunar New Year, Chuseok or national holidays are not deducted, because they vary by country and year. Subtract any holidays that fall in your range manually to get the final number of business days. Tip: to count a period such as “Monday through Friday of one week” as 5 days, keep “Include end date” checked.
📘 How to use
- 1
Select the start date
Choose the first day of the period; it defaults to today.
- 2
Select the end date
Choose the last day and decide whether to tick “Include end date.”
- 3
Check the counts
The number of working days and weekend days appears instantly.
❓ FAQ
Are public holidays excluded?
No. Only Saturdays and Sundays are excluded. Subtract any public holidays in your range manually.
What does “Include end date” do?
When checked, the end date is counted as part of the range. When unchecked, counting stops the day before the end date.
What if I enter the end date before the start date?
The calculator swaps the two dates automatically and counts the same range.
Can I count a six-day work week?
Not directly. Weekdays are always Monday to Friday, but you can add the weekend count if Saturdays are workdays for you, keeping in mind it also includes Sundays.