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Business Days Calculator

Count the business days between two dates by excluding Saturdays and Sundays — useful for delivery estimates, processing windows, notice periods, and any deadline quoted in working days rather than calendar days.

Who this calculator helps

  • Estimating when a shipment quoted in '5 business days' will arrive.
  • Checking a refund, payout, or bank transfer processing window.
  • Working out a two-week notice period in working days.
  • Project planning where only weekdays count as capacity.
  • Sellers promising handling and dispatch times in business days.

Business days

20

Calendar days

26

Weekend days excluded

6

This calculator excludes weekends only. It does not account for public holidays.

All calculations are estimates based on average platform fees. Real profits may vary depending on category, ads, and shipping.

How to use this calculator

  1. Enter your numbers in each field above — the calculator updates instantly as you type, so there's nothing to submit.
  2. Use your real figures when you have them, or sensible estimates while you're planning. If a field doesn't apply, leave it at zero.
  3. Compare the results, then change one input at a time to see how each lever (price, cost, fees, volume) moves the outcome.

When to use this calculator

  • A policy, contract, or courier quotes a deadline in business days.
  • You need weekday-only capacity for a sprint or production schedule.
  • You want to know how many weekend days sit inside a date range.
  • You are checking whether a deadline lands on a weekend.

Formula

Business days = Calendar days in range − Saturdays − Sundays

Worked example

From Monday 2026-01-05 to Friday 2026-01-30, including both dates.

  1. The range covers 26 calendar days.
  2. It contains 3 Saturdays and 3 Sundays = 6 weekend days.
  3. 26 − 6 = 20 business days.

Answer: 20 business days

More worked examples

A 5-business-day dispatch window starting Thursday 2026-02-05, counting both ends.

  1. Feb 5 to Feb 11 is 7 calendar days.
  2. That span includes Sat Feb 7 and Sun Feb 8.
  3. 7 − 2 = 5 business days.

Answer: The order lands on Wednesday 2026-02-11

A full calendar month: 2026-03-01 to 2026-03-31, both included.

  1. 31 calendar days.
  2. March 2026 contains 9 weekend days.
  3. 31 − 9 = 22 business days.

Answer: 22 business days

How it works

The calculator walks every date in the range and counts each one that falls Monday to Friday. Saturdays and Sundays are reported separately so you can see exactly what was removed.

Whether the start and end dates count is a choice, not a rule — different policies differ. Use the include toggles to match the wording you were given, and read the calendar-day total as a sanity check.

If the end date is earlier than the start date, the span between them is still counted and the calculator flags the order so you are not left with a confusing negative.

This calculator excludes weekends only. It does not account for public holidays.

Expert tips

  • Most courier and bank policies exclude the day you order, so untick 'include start date' to match them.
  • Add a buffer day or two for public holidays — this tool does not know your country's holiday calendar.
  • Compare against the Days Between Dates calculator to see how much of a long span is weekend time.
  • For weekday-only staffing, multiply business days by daily capacity rather than using calendar days.
  • If a deadline lands on a weekend, most policies push it to the next business day — check the wording.

How to interpret your results

  • Dollar values are shown per sale, per order, or per item unless a result is explicitly labelled monthly, weekly, or daily.
  • Percentages (margin, ROI, conversion rate) are easier to compare across products and price points than raw dollars — use them when you benchmark.
  • A positive result means you're ahead after the costs and fees you entered. A negative result means the current numbers don't work — change a lever (raise price, cut a cost, lower ad spend) and recalculate.
  • Treat the output as a planning estimate, not a guarantee. Fees, taxes, and conversion rates shift over time — re-run the numbers whenever a key input changes.

Limitations

  • Public holidays, company closures, and religious observances are not excluded.
  • It assumes a Monday–Friday working week and cannot model Sunday–Thursday or six-day weeks.
  • Results are in whole days; times of day are not considered.

Common mistakes

  • Expecting holidays to be excluded — only weekends are.
  • Counting both endpoints when the policy excludes the order date.
  • Assuming a 'week' is 7 business days; a full week is 5.
  • Entering an end date before the start date and reading the span as a negative.

Related Guides

Go deeper with plain-English guides on the same topic.

FAQ

How many business days are in a week?
Five — Monday through Friday. Saturdays and Sundays are excluded.
Does this exclude public holidays?
No. This calculator excludes weekends only. It does not account for public holidays, so add a buffer day if a holiday falls in your range.
Should I include the start date?
It depends on the policy. Shipping and banking windows usually start counting the next business day, so untick 'include start date' for those.
What happens if the end date is before the start date?
The calculator still counts the span between the two dates and flags that the order is reversed.
How many business days are in a month?
Usually 20 to 23, depending on how the weekends fall. Enter the first and last day of the month to get the exact figure.
Are business days and working days the same?
In everyday use, yes — both usually mean Monday to Friday, excluding public holidays.
Does this count weekends anywhere in the results?
Yes, weekend days are shown separately so you can see exactly how many days were removed.

Why trust this calculator?

This tool uses standard mathematical formulas and commonly accepted calculation methods, shown openly in the Formula section above so you can verify the math yourself. Results are estimates based on the information you enter and do not account for every individual circumstance. For important financial, tax, legal, medical, or business decisions, please double-check with a qualified professional before acting on the numbers.

Keep going

One calculator rarely tells the full story. Pair this one with a related tool below to pressure-test your numbers from a different angle, or browse Time & Date Calculators for more in the same category.

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