What Is a Working Days Calculator?
A Working Days Calculator determines how many working days fall
between two selected dates. It can exclude weekends and specific
holidays so that only eligible workdays are included.
This is useful when a deadline is expressed in working days
rather than calendar days. Common examples include project
deadlines, order processing periods, employee schedules,
administrative tasks, and business service timelines.
Basic Working Days Formula
Working Days =
Calendar Days − Weekend Days − Eligible Holidays
A holiday is only removed when it would otherwise qualify as
a working day. This prevents a holiday that falls on an already
excluded weekend from being deducted twice.
How to Use the Working Days Calculator
You can calculate your working-day period in three simple steps.
1
Select Your Dates
Choose the beginning and ending dates of the period you
want to calculate.
2
Choose Exclusions
Select weekend days and enter any custom holidays that
should not count as working days.
3
View the Breakdown
See total working days, weekends, holidays, calendar days,
and non-working days.
Working Days vs Calendar Days
Working days and calendar days measure a date range differently.
Calendar days include every eligible date in the selected period,
while working days remove specified non-working dates.
Calendar Days
Every included date in the selected period, regardless of
whether it is a weekday, weekend, or holiday.
Working Days
Dates treated as regular workdays after your selected weekend
and holiday exclusions are applied.
Non-Working Days
Dates excluded because they are selected weekend days or
eligible custom holidays.
When Is a Working Days Calculator Useful?
Working-day calculations are useful whenever schedules or
deadlines depend on actual workdays instead of all calendar days.
- Planning project deadlines and milestones.
- Estimating order processing periods.
- Calculating business service timelines.
- Planning employee work schedules.
- Estimating administrative processing times.
- Counting working days within a month or year.
- Planning invoice and payment periods.
- Calculating internal business deadlines.
Working Days Calculation Example
Suppose your selected date range contains 20 included calendar
days. Within that period there are six excluded weekend days
and one custom holiday that falls on a weekday.
20 Calendar Days − 6 Weekend Days − 1 Holiday
= 13 Working Days
If the holiday fell on an already excluded Saturday or Sunday,
it would not be deducted a second time.
What Counts as a Working Day?
Standard Weekdays
Monday through Friday are commonly treated as working days,
but working schedules vary between organizations, countries,
and industries.
Saturday and Sunday
This calculator excludes Saturday and Sunday by default.
You can uncheck either option if that day should count as
a regular working day for your calculation.
Public and Company Holidays
Holiday calendars differ by location and employer. For that
reason, this calculator lets you enter specific holiday dates
manually rather than assuming one universal holiday calendar.
Start and End Dates
You can independently choose whether the start date and end
date should be included in the calculation. This makes the tool
useful for different deadline and scheduling conventions.
Frequently Asked Questions
What are working days?
Working days are dates treated as normal workdays under a
particular schedule. Monday through Friday is common, although
the exact schedule can vary.
Does the Working Days Calculator exclude weekends?
Yes. Saturday and Sunday are excluded by default, but you can
change either setting before calculating.
Does the calculator exclude holidays?
It can exclude custom holidays that you enter manually. This
allows the calculator to work with different holiday calendars.
Can Saturday count as a working day?
Yes. Uncheck "Exclude Saturday" and Saturday will be treated
as an eligible working day.
Are the start and end dates included?
Both are included by default. Separate options allow you to
exclude either boundary date when required.
What happens if a holiday falls on a weekend?
The calculator does not subtract it twice. If the date is
already excluded as a weekend, it remains one non-working day.
Can I use this calculator for project deadlines?
Yes. It can help count workdays within a project period, but
you should apply your organization's actual schedule and holiday
rules when setting a formal deadline.