Business Days Calculator
Counts working days between two dates, or finds the date N business days after a start date. Since weekends differ by country, you can choose Sat-Sun, Fri-Sat or Sunday only. Public holidays vary by country and year, so they are not included. All calculations run in your browser.
Enter dates to see the result.
How to use
- Pick a mode (between dates / after N days).
- Enter dates and choose the weekend days.
- The business day count or target date appears in real time.
Calculation basis and verification sources
Between-dates mode includes both start and end, excluding only the selected weekend days. Add-business-days mode starts counting on the day after the start; N must be an integer from 1 to 10,000. It uses calendar dates on the device and does not calculate times or time zones.
Rules checked: 2026-08-07. Public, temporary and substitute holidays, company closures, and country-specific legal extensions are not included. For contractual, filing, or court deadlines, check the responsible authority's official calendar and deadline rules separately.
Frequently asked questions
Are public holidays excluded?
No. Only the selected weekend days are excluded; public holidays are not included. Because a holiday may overlap a weekend, do not simply subtract a count—compare each date with the official calendar for the relevant location.
Why can I choose the weekend days?
Because weekends differ by country. Most countries rest on Saturday-Sunday, while some Middle Eastern countries use Friday-Saturday.
Is the start date counted?
In between-dates mode, both the start and end dates count if they are not weekends. In after-N mode, counting starts from the next business day.
Practical example and verification criteria
Business Days Calculator: Before calculating, check whether amounts are before or after tax, whether a term is in days, months, or years, whether a rate is annual or monthly, and whether start and end dates are inclusive. Align body measurements and currency, length, and time units as well. On-screen defaults may be illustrative assumptions, so replace them with your own conditions.
Business Days Calculator: For a quick check, start with 2026-08-03 → 2026-08-04 as a small input whose result relationship you can verify directly. Confirm that the input summary, units, and options match your intent before applying the tool to real values or a copy of the source; this reduces setup mistakes.
Business Days Calculator: Read the input summary and formula, then check reversible relationships such as principal plus interest, net amount plus tax, or start date plus term. Test values around rounding, zero, one, and date boundaries. Compare health, finance, tax, and administrative results with current official information for the applicable region and effective date.
Business Days Calculator · Work record: For real work, record the input conditions, selected options, and result together. Do not assume the same state will remain after a refresh or device change. Preserve important results separately using copy, download, a screenshot, or another method the page supports, then reopen them in the target environment.
Business Days Calculator · Error check: If an error or unexpected result appears, reduce the input, run again with default options, and then change one condition at a time. Recording error messages and boundary values helps distinguish format issues, unsupported cases, and browser resource limits, and prevents an empty result from being mistaken for success.
Business Days Calculator · Scope of use: Check the page guidance for browser processing versus server lookup, storage location, and supported scope. Use sensitive source material or secrets only when strictly necessary. High-impact work such as legal, financial, or medical decisions or changes to an operational system requires current authoritative information and a separate verification process.