Workdays per Month: Calculate Your Monthly Total

Workdays per month are the weekdays that count as working days after nonworking holidays and other days off are excluded. Use this calculator to enter the number of calendar days in the month, weekend days, and holidays or other nonworking days; it estimates the remaining workdays.

Formula

Estimated workdays = calendar days − weekend days − holidays and other nonworking days.

• Calendar days is the total number of days in the month, from 28 to 31 in the Gregorian calendar.
• Weekend days is the number of Saturdays and Sundays in that month, or the days your schedule treats as regular nonworking days.
• Holidays and other nonworking days is the number of additional days off that fall on otherwise scheduled workdays. Do not count a holiday that already falls on a weekend if you are using a Monday-to-Friday schedule.
• Workdays is the estimated number of days available for work, expressed as a count of days.

This is a count, not a number of hours. The formula assumes one standard weekly pattern and that each listed holiday removes one potential workday. The calculator rejects a combination that would subtract more days than the month contains.

Worked Example

With the default entries, the month has 30 calendar days, 8 weekend days, and 1 holiday or other nonworking day:

30 − 8 − 1 = 21 workdays.

The result is 21.0 days, rounded to one decimal place as configured. The decimal display is a formatting choice; workdays are normally reported as whole days.

Why the Number Changes by Month

A quick estimate often starts with roughly 20 to 22 Monday-to-Friday workdays in an ordinary month before holidays and leave. The exact count changes because months have different lengths and begin on different weekdays. A 31-day month contains three more days than a 28-day month, but those extra days may include a weekend, a weekday, or both.

For example, a 30-day month can contain eight or nine Saturdays and Sundays, depending on its starting weekday. Before holidays, that leaves 21 or 22 weekdays. A 31-day month can have eight, nine, or ten weekend days, leaving 21 to 23 weekdays. These are calendar counts, not guarantees about any particular employer’s schedule.

In a common Monday-to-Friday pattern, the number of weekdays over an entire year is usually 260 or 261, depending on the year’s calendar. Dividing by 12 gives an average of about 21.7 or 21.8 weekdays per month. This annual average is useful for rough planning, but it does not mean every month has that many workdays.

How to Count Weekends and Holidays

For an accurate figure, use the actual calendar and the workweek that applies to the person or organization. A standard Saturday-Sunday weekend is not universal; some schedules use different rest days, rotating shifts, or work every day of the week.

1. Count the calendar days in the month.
2. Mark the regular nonworking days, such as Saturdays and Sundays for a Monday-to-Friday schedule.
3. Count holidays that fall on otherwise scheduled workdays, plus any other planned closure days.
4. Subtract those nonworking days from the calendar total.

Count an observed holiday on the date the workplace actually closes, rather than automatically counting both the holiday’s calendar date and its observed date. If a holiday falls on a weekend and the workplace observes a weekday instead, count the observed weekday once. Holiday calendars and observance rules vary by country, region, employer, and year, so check the relevant calendar rather than assuming a universal list.

What Counts as a Workday?

“Workday” can refer to different things. In a basic calendar calculation, it usually means a scheduled weekday that is not a holiday or closure. It does not necessarily mean a day that a particular employee actually works. Annual leave, sick leave, personal days, training, part-time schedules, and shift patterns can change the individual’s worked days without changing the business calendar’s workdays.

That distinction matters for planning. A business may have 21 working days in a month while an employee takes two days of leave and works 19. Conversely, a person on a weekend or rotating schedule may work on dates that a Monday-to-Friday calendar labels as weekends. For payroll, staffing, project deadlines, or service commitments, follow the applicable workplace definition and schedule.

Workdays are also not the same as working hours. To estimate hours, multiply the days actually scheduled by the normal hours per day, then account for part-time hours, breaks, leave, and other schedule details as relevant. The calculator here does not convert days into hours or account for those exceptions.

Using the Estimate for Planning

A monthly workday count can help with rough project schedules, workload comparisons, capacity estimates, and recurring planning. It is often more informative to compare like with like: use the same weekend definition, holiday calendar, and treatment of closures for every month in the comparison.

• For a quick estimate: use the calculator’s three counts and treat the result as a calendar-based approximation.
• For a specific month: count its actual weekdays and applicable closure dates rather than relying on a monthly average.
• For a personal schedule: start with scheduled shifts, then subtract leave or other days not worked if the question is about days actually worked.
• For a year-long estimate: calculate each month separately when the timing of work matters; use an annual average only when a broad planning figure is enough.

A common mistake is to subtract all weekend dates and then subtract a weekend holiday again. That double-counts the same date. Another is to treat every public holiday as a day off: whether it is nonworking depends on the location, job, and employer. The calculator’s “holidays and other nonworking days” entry should include only additional days that would otherwise be workdays under the schedule being counted.

Frequently Asked Questions

How many workdays are there in an average month?
An average month has about 21.7 Monday-to-Friday weekdays before holidays, based on roughly 260 to 261 weekdays in a typical calendar year divided by 12. The exact number varies by month and year.

Is a month always counted as having 20 workdays?
No. Twenty is a convenient rough estimate in some contexts, but a month usually has around 20 to 23 Monday-to-Friday weekdays before holidays. Use the actual calendar for a precise count.

Do public holidays count as workdays?
Only if the schedule or workplace treats them as working days. For this estimate, subtract holidays that are nonworking days and fall on otherwise scheduled workdays.

Does this calculator account for paid time off?
No. It estimates calendar workdays after the nonworking days entered. To estimate an individual’s days actually worked, also account for that person’s leave, shifts, and other absences.

How do I count workdays for a month with a different weekend?
Count the days your own schedule treats as regular nonworking days, not automatically Saturday and Sunday. Enter that total as “Weekend days in month,” then subtract applicable holidays and closures.

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in days | Calendar days in month | days | 30 | 1 | 31
in weekend | Weekend days in month | days | 8 | 0 | 31
in off | Holidays and other nonworking days | days | 1 | 0 | 31
out workdays | Workdays per month | days | days - weekend - off + 0 * sqrt(days - weekend - off) | 1