By Intious · Updated September 15, 2026
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Actual months do not all contain four weeks
For a Monday–Friday schedule of eight hours a day, count the weekdays in the specific month. Twenty working dates equal 160 hours; 21 equal 168; 22 equal 176; and 23 equal 184. These figures come before closures, individual absences and any extra hours.
Where the 173.33-hour figure comes from
A common annualized convention starts with 40 hours a week multiplied by 52 weeks, giving 2,080 hours. Dividing by 12 produces 173.333… hours per month. That is a planning average under that convention. It is not a count of working dates in a specific calendar month and does not automatically determine payable hours.
Example: September 2026
September 2026 has 22 Monday–Friday dates, giving 176 scheduled hours at eight hours per day. If your workplace closes on September 7, remove eight hours to get 168. Do not deduct a holiday merely because it appears on a public calendar: use the actual operating calendar for the team being planned.
Choose the figure that matches the task
| Task | Starting figure |
|---|---|
| Plan staffing for one month | Actual working dates and daily hours |
| Compare broad annual capacity | Clearly stated annual hours convention |
| Check an hourly paycheck | Actual payable hours for the pay period |
| Compare salaried check sizes | Annual salary and payroll frequency |
Avoid counting time off twice
Remove a company closure at the calendar stage. Subtract individual absences afterward only when they fall on remaining scheduled days. If a person requests leave on a date already removed as a closure, deducting it again understates capacity. The same principle applies to weekends that were never selected as working days.
For ranges crossing month boundaries, use the business-days calculator. For paycheck comparisons, use the biweekly versus semimonthly calculator. Neither a calendar total nor a monthly average replaces the employer’s payroll rules.
Frequently asked questions
How many work hours are in a month?
It depends on the month, working weekdays, daily hours and closures. Twenty-two scheduled days at eight hours equal 176 hours before closures or individual absences.
Are public holidays deducted automatically?
No. Enter the closure dates that apply to your organization. A public holiday and an employer closure are not always the same thing.
Will a Sunday closure reduce a Monday–Friday schedule?
No. Only a closure on a selected working weekday reduces the total. Duplicate dates are counted once.
Can I use a four-day workweek?
Yes. Select the four working weekdays and enter the scheduled hours per day. This model assumes the same hours on each selected day.
Is this my paid-hours total?
Not necessarily. This is scheduled capacity after closures. Paid holidays, paid leave, overtime and payroll rules require a separate payable-hours calculation.