Business Days Calculator
Count working days between two dates. Weekends are always excluded; you can optionally exclude US federal holidays from the sample list.
Choose a start and end date to count business days.
Next step: Working Days Calculator
When to use this calculator
Use this calculator whenever you need to count weekdays only between two known dates—delivery estimates, SLA timelines, payroll windows, or any deadline measured in business days rather than calendar days.
Delivery estimates
Count how many business days a shipment or service window spans between order and delivery dates.
SLA timelines
Check how many business days elapsed within an SLA window between two known timestamps.
Payroll windows
Count weekdays in a pay period for hourly or per-diem calculations.
All calendar days instead
For all calendar days regardless of weekends, use the Days Between Dates calculator. To find someone's age, use the Age Calculator.
Inputs
Start date
The first date of the range.
End date
The last date of the range.
Exclude US federal holidays
Optionally skip dates in the sample US federal holiday dataset (2024–2026) in addition to weekends.
How the calculation works
Business days are counted on the UTC calendar from the start date through the end date, inclusive. Saturdays and Sundays are skipped. When you enable the holiday option, dates in our US federal holiday dataset (2024–2026) are also excluded.
This is useful for delivery estimates, SLA timelines, and payroll windows. For all calendar days regardless of weekends, use the Days Between Dates calculator. To find someone's age, use the Age Calculator.
Worked example
Start date: Monday 6 January 2025. End date: Friday 10 January 2025.
Business days: 5 (Monday through Friday, no weekend days in the range).
If the end date were instead Monday 13 January 2025 (spanning a weekend), the count would be 2 business days: Friday 10 January and Monday 13 January—Saturday and Sunday are skipped.
Edge cases
Same start and end date
A range from a date to itself is 1 business day if that date is a weekday, or 0 if it's a weekend.
End date before start date
You get a negative business-day count with the same magnitude as if the dates were swapped—useful for seeing how far back a deadline was missed.
Holiday on a weekend
A holiday that falls on a Saturday or Sunday is already excluded by the weekend rule, so enabling holiday exclusion doesn't change the count for that date.
Full year range
Counting business days across a full calendar year without holiday exclusion returns roughly 260–262 days, depending on which weekdays January 1 and December 31 fall on.
Related Date & Business Days Calculators
The Business Days vs Calendar Days Guide explains when weekends and holidays count and which day type applies to deadlines, invoices, and contracts.
The How Business Days Are Calculated Guide and Business Days Between Dates Guide cover the counting rules behind every business-day tool on this site.
The Business Days Calculator and Working Days Calculator count weekdays between two known dates, excluding weekends and optional US federal holidays.
The Add Business Days To Date, Subtract Business Days From Date, and Business Day Offset calculators move a single date forward or backward by a business-day count.
The Business Days Until Date Calculator counts business days remaining from today or a custom date to a target deadline.
The Days Between Dates Calculator counts every calendar day between two dates, including weekends—use it instead of the business-day tools when weekends should count.
The Date Range Calculator and Date Duration Calculator break a range into calendar-day totals or a years/months/days breakdown, with inclusive or exclusive boundary options.
The Add or Subtract Days Calculator shifts a single date forward or backward by days, weeks, or months.
The Age Calculator applies the same calendar breakdown used by Date Duration to a birth date, expressed as years, months, and days.
The Hours Between Dates and Date Difference calculators measure elapsed time between two date-times down to hours, minutes, and seconds.
The Date Format Converter, Unix Timestamp Converter, and Timezone Converter handle format and zone conversion for a single instant rather than a span between two dates.
FAQ
- Which holidays are included?
- The optional list covers US federal holidays in our sample dataset for 2024–2026. It is meant for quick estimates, not legal or payroll compliance in every jurisdiction.
- Is the count inclusive?
- Yes. Both the start and end date are included when they are business days. A range from Tuesday to Tuesday (same day) is 1 business day.
- What if the end date is before the start?
- You get a negative business-day count with the same magnitude as if the dates were swapped—useful for seeing how far back a deadline was missed.
- How is this different from the Working Days Calculator?
- Same underlying weekday-counting engine—"business days" and "working days" are the same concept under two common names some readers search for separately.
Related Guides
- Business Days vs Calendar Days GuideLearn what calendar days and business days mean, when each applies to deadlines and contracts, and which DateToolsHQ calculators to use for invoices, SLAs, notice periods, and more.
- How Business Days Are CalculatedUnderstand how business day counts work: weekends, holidays, inclusive ranges, and how DateToolsHQ applies the rules.
- How Holiday Calendars Affect Business DaysSee how public holidays change business-day counts, why calendars differ by country and employer, and how to use DateToolsHQ holiday data for planning.
- Business Days Between Dates GuideLearn how to count business days between two dates, when weekends and holidays apply, and which DateToolsHQ calculators to use for deadlines and scheduling.
Browse all Date & Business Days
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- Working Days CalculatorCount working days between dates, excluding weekends and optional holidays.
- Invoice Due Date CalculatorCalculate invoice due dates from net payment terms with optional weekend adjustment.
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- Business Day Offset CalculatorAdd or subtract business days from a start date in one calculator, skipping weekends and optional US holidays.
- Add Business Days To Date CalculatorAdd business days to a start date and get the resulting UTC date, skipping weekends and optional US holidays.
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