Business Days Calculator
Count working days between two dates excluding weekends and custom holidays.
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What is Business Days Calculator?
A Business Days Calculator counts the working days between two dates, skipping weekends and any holidays you specify. Teams use it for deadlines, SLA countdowns, delivery estimates, payroll periods, and project timelines — anywhere "how many working days do we have left?" matters. Enter a start date, an end date, and optionally a list of holidays; the tool instantly shows business days, total calendar days, weekend days, and estimated work hours. Everything runs locally in your browser.
Key Benefits
- Instantly answers "how many working days until the deadline?" without counting on a calendar
- Excludes custom holidays so counts match your company or country calendar
- Flexible Saturday rule for teams that work six-day weeks
- Adds estimated work hours for capacity planning and sprint scheduling
- Runs offline in your browser with zero data collection
Common Use Cases
- •Counting working days remaining before a project deadline or release date
- •Calculating SLA response or resolution windows in business days
- •Estimating delivery or shipping dates that skip weekends and holidays
- •Planning sprint capacity by converting calendar time into working days
- •Verifying invoice or payroll periods in business-day terms
How to Use the Business Days Calculator
- Enter start and end dates: Pick the start date and end date using the date fields. If the end date is before the start date, the tool swaps them automatically.
- Choose your weekend rule: Keep the checkbox checked to treat Saturday as a non-working day, or uncheck it if your team works Saturdays.
- Add holidays to exclude: Type holiday dates separated by commas or new lines in YYYY-MM-DD format. Each matching weekday is subtracted from the count.
- Read the results: The calculator shows business days, total calendar days, weekend days, holidays excluded, calendar weeks, and estimated work hours.
Key Features
- Counts working days between any two dates, excluding weekends by default
- Toggle Saturday as a working day with a single checkbox
- Paste custom holidays (YYYY-MM-DD or MM/DD) to exclude from the count
- Shows total days, weekend days, holidays excluded, and calendar weeks
- Estimates total work hours based on an 8-hour workday
- Runs entirely in your browser — no data leaves your device
Frequently Asked Questions
Does the calculator count the start and end dates themselves?
Yes, both the start date and the end date are included in the count. If you need to exclude the end date, set it to the day before the deadline you are targeting.
How do I treat Saturday as a working day?
Uncheck the "Exclude Saturday" checkbox. The calculator will then count Saturdays as business days while still excluding Sundays and any holidays you listed.
What holiday formats are supported?
Holidays must be entered in YYYY-MM-DD format, separated by commas or new lines. Only holidays that fall on a working day (Monday to Friday) are subtracted from the count.
How are work hours estimated?
The estimated work hours multiply the number of business days by 8 hours, a standard full-time workday. Adjust mentally if your team works different hours.