Working 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 working days.
Next step: Business Days Calculator
When to use this calculator
Use this calculator whenever you need to count weekdays only between two known dates, using the "working days" terminology common in project timelines, staffing plans, and delivery estimates that follow a Monday–Friday week.
Project timelines
Count working days available for a project phase between two milestone dates.
Staffing plans
Estimate weekday coverage needed between a start and end date.
Delivery estimates
Check how many working days a shipment or service window spans.
"Business days" terminology instead
For the same logic under the name "business days," see the Business Days Calculator. For all calendar days, use Days Between Dates.
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
Working 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 calculator uses the exact same counting engine as the Business Days Calculator—"working days" and "business days" are the same concept under two names people search for separately.
Worked example
Start date: Monday 6 January 2025. End date: Friday 10 January 2025.
Working 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 working 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 working day if that date is a weekday, or 0 if it's a weekend.
End date before start date
You get a negative working-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.
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 working days. A range from Tuesday to Tuesday (same day) is 1 working day.
- What if the end date is before the start?
- You get a negative working-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 Business Days Calculator?
- Same underlying weekday-counting engine—"working days" and "business days" describe the same Monday-through-Friday count under two common names.
Related Guides
- How Many Working Days Are in a Year?See how working day totals are derived from calendar days, weekends, and holidays—and how to use country and year pages for planning.
- Working Days vs Business DaysCompare working days and business days: when the terms overlap, when they differ, and which DateToolsHQ tools to use.
- Working Days GuideLearn what working days are, how they differ from business and calendar days, and which DateToolsHQ calculators to use for scheduling and deadlines.
- 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.
Browse all Date & Business Days
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- Business Days CalculatorCount working days between dates, excluding weekends.
- Invoice Due Date CalculatorCalculate invoice due dates from net payment terms with optional weekend adjustment.
- 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.
- Notice Period CalculatorCalculate notice period end dates from a start date and length in days, weeks, or months (calendar or business days).
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