Home › Date & Time Calculators › Working Days Calculator

Working Days Calculator

Accurately quantifying total working days between two dates is essential for project sprint estimation, construction staffing, manufacturing productio

Time & Date
hrs/day
Formula & Methodology
Working Days = Total Days − Excluded Weekend Days Total Productive Hours = Working Days × Hours Per Day

The algorithm iterates through every calendar day between the start and end dates. Depending on the selected workweek profile, non-working days (Sundays for 6-day weeks; Saturdays and Sundays for 5-day weeks) are filtered out, leaving net working days.

Total Working Days in Period

22 working days

Overview

Accurately quantifying total working days between two dates is essential for project sprint estimation, construction staffing, manufacturing production scheduling, and freelance retainers. The Working Days Calculator computes the net working days and total productive hours between any two dates.

This calculator supports standard 5-day workweeks (Monday–Friday) as well as 6-day commercial schedules (Monday–Saturday). It excludes weekend days and computes total billable hours based on your configured workday length. Please note that public holidays are not included in this calculation.

Worked Examples

Example 1: Month of January 2026 (5-Day Workweek, 8 Hours/Day)

Start: 2026-01-01, End: 2026-01-31, Workweek = 5-Day, Hours = 8

  1. Total calendar days: 30 days between Jan 1 and Jan 31.
  2. Weekend days in January 2026 (Saturdays and Sundays): 8 days.
  3. Working days: 30 − 8 = 22 working days.
  4. Total work hours: 22 × 8 = 176 hours.
Final Answer: 22 working days (176 total hours)

Example 2: Same Span with 6-Day Workweek (Mon–Sat)

Start: 2026-01-01, End: 2026-01-31, Workweek = 6-Day, Hours = 8

  1. Only Sundays are excluded: 4 Sundays.
  2. Working days: 30 − 4 = 26 working days.
  3. Total work hours: 26 × 8 = 208 hours.
Final Answer: 26 working days (208 total hours)

Example 3: Two-Week Sprint (March 2, 2026 to March 16, 2026)

Start: 2026-03-02 (Monday), End: 2026-03-16 (Monday), 5-Day Week

  1. 14 calendar days total.
  2. Saturdays and Sundays: 4 weekend days.
  3. Working days: 14 − 4 = 10 working days.
  4. Work hours: 10 × 8 = 80 hours.
Final Answer: 10 working days (80 total hours)

How to Use This Calculator

  1. Select your starting date and ending date.
  2. Choose your workweek schedule (5-Day Monday–Friday or 6-Day Monday–Saturday).
  3. Enter your standard working hours per day (e.g., 7.5 or 8 hours).
  4. Inspect the total working days and productive hours for timesheet or staffing planning.

Frequently Asked Questions

Does this calculator account for public or bank holidays?
No. This calculator filters out weekends only and does not account for public holidays. To incorporate company-specific holidays, deduct the holiday count directly from the result.
What is the difference between a 5-day and 6-day workweek option?
A 5-day schedule excludes Saturdays and Sundays. A 6-day schedule treats Saturday as a regular working day and excludes only Sunday.
Are both the start and end dates included in the count?
The calculation uses the standard interval span between dates (start date included, end date excluded as the boundary).
How do I calculate fractional daily hours (e.g., 7.5 hours per day)?
Enter 7.5 in the Work Hours Per Day field to scale the total productive hours accurately.
How do I calculate what date a project will finish after N working days?
Use our Business Days Calculator to project forward by a specific count of working days.

Related Calculators

🧮Business Days Calculator🧮Days Between Dates Calculator🧮Days Until Date Calculator🧮Date Difference Calculator🧮Date Calculator
Reviewed & Authored by: OnlineConvers Editorial Team · Last Updated: 2026-10-06
Working days are calculated by iterating through the calendar span at UTC midnight and excluding weekend days according to the selected workweek profile. Public holidays are excluded to maintain global applicability.