Business Days Calculator
Count working days between dates so you can plan deadlines, payroll, deliveries, and cash flow with fewer surprises.
- 2026 figures, checked October 26, 2026
- 1 official source
- Private: runs in your browser
- How we check our work
Result
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Verify before you act: review these results with a CPA or other qualified business advisor before making any decision based on them.
Suggestions for your numbers
Updated as you type, from your inputs only. General information, not personal advice; confirm any change with a qualified professional.
See it over time
Hover over or tap the chart to see the numbers for any point.
What is a business days calculator?
A business days calculator counts weekdays between two dates, with options to exclude weekends and federal holidays. It is also called a working days calculator or business day calculator.
A calendar day is any day on the calendar. A business day is generally a weekday when work or business services are operating. The exact meaning can depend on the contract, agency, or organization setting a deadline, so check their terms before relying on a count.
Why business days matter
A deadline stated in business days can fall later than the same number of calendar days. That difference affects when you submit paperwork, expect a payment, schedule a delivery, or follow up on an approval.
For a business, accurate counts help you plan payroll, supplier payments, customer delivery dates, and cash needs. If a customer has a payment deadline, compare it with your own cash-flow plan before committing to a delivery or purchase.
Employees and customers can use the count to set realistic expectations for processing time. If a bank, agency, or contract defines business days differently from this calculator, use its definition.
How to use this business days calculator
- Enter the start date and end date for the period you want to count.
- Set the weekend and federal-holiday options to match the deadline or schedule you are planning around.
- Select calculate to see the business-day count and its breakdown.
- Check the calendar days, weekend days, and federal holidays on weekdays shown in the result. Confirm how the relevant contract or organization treats the start and end dates before using the count for a formal deadline.
Business days calculator example
Worked example
For a start date of 2026-10-26 and an end date of 2026-12-31, the sample result is 45 business days. The calculator shows 66 calendar days between the dates, 18 weekend days, and 3 federal holidays on weekdays. The breakdown explains how the result is reached.
How to read your business-day result
The main result is the number of weekdays left after applying your selected exclusions. The breakdown lets you see how weekends and federal holidays affect the count.
Use the result as a planning estimate, not as a substitute for the rules that apply to your deadline. Confirm whether the start date counts, whether the end date counts, and which holidays the other party observes. The calculator can skip the 11 federal holidays when selected; OPM publishes information about federal holidays.
How to improve your business-day planning
- 01
Build deadlines around the receiving party
Before promising a delivery or response date, check the receiving agency's, customer's, or supplier's definition of a business day. Add time for any review or handoff they require.
- 02
Prepare complete submissions
Gather the forms, signatures, and supporting documents before you submit a request. An incomplete submission can lead to follow-up and push your expected completion date.
- 03
Match payment terms to cash needs
Compare customer payment dates with supplier bills and payroll dates. If the gap strains cash, consider requesting a deposit, renegotiating supplier terms, or adjusting the delivery schedule.
- 04
Track actual processing time
Record when requests are submitted and completed. Use your own records to set more realistic customer and employee expectations, and revise your schedule when actual turnaround changes.
Common business-day mistakes
Treating business days as calendar days
A weekday count excludes days that a calendar-day count includes. Do not assume a deadline stated in business days falls on the same date as a calendar-day estimate.
Assuming every organization observes the same holidays
A federal holiday may not be treated the same way by every employer, bank, supplier, or contract. Check the other party's schedule before setting a firm date.
Skipping the deadline's counting rules
Some terms specify whether the start date or end date is counted. Read the instructions or agreement, then set the calculator options and dates to match.
Using a count without checking delays
The result counts days; it does not predict how long a review, shipment, or payment will actually take. Allow for the process involved and update your plan when you receive new information.
The business days formula
Counts weekdays between the dates, skipping the 11 federal holidays when selected.
Key terms
- Business day
- A weekday counted for business purposes, subject to the definition used by the relevant organization or agreement.
- Calendar day
- Any day on the calendar, including weekends and holidays.
- Federal holiday
- A holiday recognized by the federal government. The calculator can exclude federal holidays when selected.
Business days questions
Does the calculator exclude federal holidays?
It can skip federal holidays when that option is selected. Check the result breakdown and confirm that the organization setting your deadline observes the same holidays.
Are business days the same as working days?
People often use the terms to mean weekdays, but the applicable definition can vary by employer, contract, or organization. Check the rules for the deadline you are calculating.
Can I use this result for a payment or contract deadline?
You can use it to help plan, but verify the agreement's counting rules, holiday schedule, and treatment of the start and end dates before relying on the result.
Sources
Before you act on this result. Cordwell calculators and guides are educational estimates, not legal, tax, investment, lending or other professional advice. They rely on the numbers you enter and on simplified rules, and they can't see your full situation. Before you file, sign, borrow, invest, hire, change your withholding or form a business based on anything here, meet with a CPA or other qualified business advisor who can review your specific facts and confirm the numbers. Rules change, and official agency guidance always controls.