Free Business Days Calculator — Count Working Days Between Dates

A delivery estimate, project schedule or administrative task often needs a count of working days rather than every date on the calendar. This free business days calculator counts eligible weekdays between two dates, excludes Saturdays and Sundays and subtracts the custom holiday dates you enter. You can choose whether the start date is included. The end date is included when it is an eligible working day. Use the result as a transparent planning calculation, with the calendar assumptions clearly stated.

How to count business days between dates

Enter the starting date and ending date for the period. Choose Yes or No for including the start date. If the period contains holidays or other nonworking weekdays, enter their dates in the holiday field using YYYY-MM-DD, with one date per line. Select Calculate to see the number of calendar dates considered, weekend dates excluded, weekday holidays excluded and remaining business days. The calculator supports dates from 1900 through 2199.

The holiday list is supplied by you. This tool does not automatically load a national calendar, identify observed holidays or know your employer’s closure dates. A public holiday falling on a Sunday might be observed on a Monday in one setting but handled differently elsewhere. Enter the actual weekday closure dates relevant to your plan. Duplicate entries are counted once, and a holiday on an already excluded weekend does not remove an additional business day.

Business days versus calendar days

Calendar days include every date, including weekends and holidays. In this calculator, business days mean Monday through Friday after subtracting your entered weekday holidays. That is a common planning convention, but it is not universal. Some organizations work Saturdays, use a different weekend or run every day. This version does not support a custom weekend pattern, so its results may not suit those schedules.

If you simply want to move a date forward or backward by a number of calendar days, use our date calculator. That tool adds or subtracts days, weeks, months and years without skipping weekends. Keeping the two functions separate avoids a frequent mistake: treating ten calendar days as though they always equal two working weeks. The answer depends on the starting date, endpoint convention and relevant closures.

Decide whether to include the start date

Endpoint rules can change a count by one day. Suppose a period starts on a Monday and ends on a Friday, with no holidays. Including the start date gives five business days. Excluding it gives four. This calculator always considers the ending date, but counts it only if it is a weekday and not in your custom holiday list. The selected start-date rule is shown in the result so the assumption remains visible.

When the starting and ending dates are the same, including the start date gives one business day if that date qualifies. Excluding it gives zero because no later dates remain in the period. Neither convention is automatically correct for every task. Read the instructions associated with a service, agreement or administrative process before deciding which convention to use. This working days calculator implements your selected convention rather than interpreting an external deadline rule.

Worked business-day example

Consider a period from Monday, November 2, 2026, through Friday, November 6, 2026. With the start date included and no custom holidays, the result is five business days. Add Wednesday, November 4, to the holiday list and the result becomes four. If you also exclude the starting Monday, the result becomes three. This example shows why sharing only the final number can be misleading without the dates and counting method.

Now extend the end date to Sunday, November 8. The weekend adds calendar dates but no business days. The result remains the same under the other assumptions. If a holiday date is entered twice, it is still excluded only once. If you enter Saturday, November 7, as a holiday, it is already excluded as a weekend and does not reduce the working-day total again.

Choosing the right holiday dates

Use an authoritative calendar for the organization and location involved. A company closure, school closure and public holiday are not necessarily identical. For an international project, participants may have different nonworking days, and a combined schedule may require a list covering several locations. Keep a note of where the dates came from and review them when the planning period changes.

The form expects actual dates rather than holiday names. Entering “Thanksgiving” does not identify a date or jurisdiction. An incorrectly formatted or invalid date produces an error instead of being silently ignored. Holidays outside the selected period are harmless because the calculator only checks dates within that period. Nevertheless, keep the list relevant so someone reviewing the result can understand why particular weekdays were excluded.

Planning delivery and project schedules

A business-day count can help compare two proposed dates, estimate the working window available for a task or explain a schedule to a customer. It does not establish a carrier’s delivery commitment or account for cutoff times, processing queues and regional service interruptions. If an order is placed late in the day, the provider may start counting from a later date. Check the provider’s actual terms before treating a calculated count as a promise.

For purchasing paperwork, our purchase order generator lets you record a requested delivery date. That date should come from a realistic agreement rather than an unexplained calculator result. For dispatch records, use the packing slip generator. These documents can support a schedule, but they do not independently verify stock availability, shipment progress or receipt by the customer.

Working days are not working hours

Five business days do not automatically mean forty working hours. Daily hours, part-time schedules, shifts and breaks vary. This calculator counts qualifying dates only. It does not calculate attendance, billable time or overtime. If you need clock-in and clock-out arithmetic, use our time card calculator, which starts with daily times and subtracts unpaid breaks under its own stated assumptions.

For a project plan, estimate both the number of available dates and the actual capacity on those dates. A person may be available for only a few hours, and several tasks may compete for that time. A calendar count is useful context, not a complete resource plan. Record leave, dependencies and review time separately so an apparently generous business-day window does not conceal an unrealistic workload.

Important limits for deadlines

Do not rely on this general calculator to determine court deadlines, immigration dates, tax filing obligations, employment notice or another consequential legal deadline. Those processes can use specific rules about service, holidays, jurisdiction, time of day and endpoint counting. This tool does not interpret those rules or identify which official calendar applies. Consult the relevant authority or qualified adviser for a binding deadline.

The calculation also ignores time zones and daylight-saving changes because it works with calendar dates, not timestamps. Internally, date arithmetic uses a consistent UTC calendar representation to avoid ordinary clock changes affecting the count. This does not turn the result into a time-zone conversion. If a deadline includes a particular hour in another location, verify the date and time separately.

Print the result and keep the assumptions

After calculating, choose Print / Save as PDF to open a clean summary. Use the print button in that window to select paper or a PDF destination. Save the dates, start-date setting and holiday list with your own notes so the result can be reproduced later. The printed summary shows counts and conventions; retain the original holiday list separately when it is important to the record.

The tool runs in your browser without an account and does not intentionally upload its form values or save them in local storage. The surrounding website may use ordinary cookies, analytics and advertising. Editing a field hides the old result until you calculate again. Before using the number, confirm the range, weekend assumption, endpoint rule and custom holiday dates one final time.

Frequently asked questions

Does the calculator know public holidays?

No. Enter the actual nonworking dates relevant to your plan. Saturdays and Sundays are excluded automatically; duplicate holiday dates and weekend holidays do not reduce the count twice.

Can I use another weekend pattern?

This version uses Saturday and Sunday only. If your organization follows another working calendar, use a tool or schedule that reflects that arrangement.