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Weekdays in a Month Calculator

Count the number of weekdays (Monday-Friday) in a given month.

Result

Weekdays
22
Weekend Days
9
Total Days
31

About the Weekdays in Month

The Weekdays in a Month Calculator counts how many Monday-through-Friday business days fall in a chosen month and year, alongside the number of weekend days and the total days in that month. It's a quick reference for anyone estimating work capacity, billing days, or attendance for a specific month without counting a calendar square by square.

How It Works

After you select a month and year, the calculator first determines the exact number of days in that month, correctly accounting for leap years in February. It then checks the day of the week for every single date in the month, sorting each one into either the weekday count (Monday through Friday) or the weekend count (Saturday and Sunday).

For each day d from 1 to the month's total day count, classify d as a weekend day if its day-of-week is Sunday (0) or Saturday (6), otherwise classify it as a weekday. Weekdays + Weekend Days = Total Days in the month.

Examples

January 2026

January 2026 begins on a Thursday and has 31 days, which the calculator breaks down into 22 weekdays and 9 weekend days.

February 2026

February 2026 begins on a Sunday and has exactly 28 days, since 2026 is not a leap year, which divides evenly into 4 full weeks: 20 weekdays and 8 weekend days.

Advantages

  • Automatically handles leap years and varying month lengths without requiring the user to look them up separately.
  • Provides a fast estimate of available business days for staffing, invoicing, or capacity planning for any given month.
  • Breaks the total days down into both weekday and weekend counts in a single result, rather than just a single figure.

Common Mistakes

  • Treating the weekday count as the final number of working days without subtracting any public holidays that fall within the month.
  • Assuming every month has the same number of weekdays, when the count actually varies, commonly between 20 and 23 for a full month, depending on which day of the week the month starts on.
  • Forgetting that February's day count changes in leap years, which shifts the weekday and weekend totals for that month specifically.

Edge Cases to Watch For

  • Public holidays are not excluded from the weekday count, since holiday calendars vary by country, state, and organization; the figure reflects Monday-through-Friday days only.
  • The total day count for the month is derived from the actual calendar, so it correctly returns 29 days for February in a leap year without any separate leap-year check needed.
  • Because a month can start on any day of the week, its weekday and weekend totals don't always split evenly; a given weekday can occur anywhere from 4 to 5 times within the same month depending on where the days land.

Common Use Cases

  • Payroll and HR teams estimating standard working days in a month for salaried or hourly staff calculations.
  • Freelancers and consultants estimating billable capacity for a given month before booking client work.
  • Project managers and schedulers blocking out a month's available business days for planning deadlines.
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Does this account for public holidays?

No - this counts Monday through Friday only, without excluding public holidays that might also fall on a weekday, since holiday calendars vary by country, state, and organization. Subtract any known holidays from the weekday count for a true working-day total specific to your situation.

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Conclusion

The Weekdays in a Month Calculator gives a precise Monday-through-Friday count for any month and year, built directly from the calendar rather than a fixed assumption. Because it doesn't account for holidays, treat its output as the baseline business-day count before subtracting any specific holidays that apply to your situation.