What counts as a workday in this calculator?

By default a workday is Monday to Friday, excluding Saturdays and Sundays. You can customize the workweek (e.g., Sunday–Thursday) and optionally exclude public holidays and your own custom days off.

Are the start and end dates included in the workday count?

You can choose whether to include or exclude the start and end dates. The default setting includes both, which matches how many payroll and project tools count workdays.

Can I add or subtract workdays from a date?

Yes. Switch to the "Add/Subtract Workdays" tab, enter a start date, choose how many workdays to add or subtract, and the calculator will return the resulting date along with a breakdown of weekends and holidays skipped.

Does this workdays calculator support holidays for different countries?

Yes. You can pick a region such as USA, UK, Canada, EU (generic), India, or Australia to auto-load common public holidays for the selected year. You can also add or remove specific dates to match your company calendar.

How accurate is the workdays calculation?

The calculator uses exact calendar logic: it iterates day by day, checks whether each date is a weekend or a holiday, and counts only the days that match your workweek settings. As long as your holiday list is correct, the result is exact.

Workdays Calculator – Business Days Between Dates & Add/Subtract Workdays

How the workdays calculator works

This workdays calculator lets you:

Count how many workdays (business days) fall between two dates.
Add or subtract a number of workdays to find a future or past date.
Customize which weekdays are considered workdays (e.g., Monday–Friday or Sunday–Thursday).
Exclude weekends and public holidays, plus your own custom days off.

Basic logic

The calculator walks through the calendar one day at a time and applies three checks:

Is this date within the selected range (respecting whether you include the start/end dates)?
Is this date a workday according to your workweek settings?
Is this date a holiday that should be excluded?

If the date passes all checks, it is counted as a workday.

Conceptual formula

Let D be all calendar days in the range, W the set of weekdays you marked as workdays, and H the set of holidays to exclude. Then:

Workdays = |{ d ∈ D : weekday(d) ∈ W and d ∉ H }|

Typical use cases

Project planning: estimate how many working days a task spans.
Payroll & HR: count payable workdays between two dates.
Delivery & SLAs: add N business days to a start date to get a due date.
Personal planning: see how many workdays remain until a vacation or deadline.

Step-by-step: count workdays between two dates

Select the “Count Workdays Between Dates” tab.
Enter the start and end dates.
Choose whether to include the start and/or end dates.
Adjust the workweek days and holiday region if needed.
Optionally add custom holidays in the Settings tab.
Click “Calculate workdays” to see the total and a detailed breakdown.

FAQ

Does the order of dates matter?

If you accidentally enter an end date that is earlier than the start date, the calculator will automatically swap them so the range is always forward in time.

What about half-days?

This tool counts whole workdays only. If you need half-days, you can approximate by treating them as 0.5 days and adjusting your expectations, or by splitting the period into separate ranges.

Are holiday lists guaranteed to be complete?

No. Public holiday presets are simplified and may not include regional or one-off holidays. For critical applications (contracts, payroll, legal deadlines), always verify dates and add missing holidays manually.

Workdays Calculator

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