Business Days Calculator
Business Days Calculator counts the weekdays between two dates and reports business days, total calendar days, and weekend days for the inclusive range.
What this calculator does
The Business Days Calculator estimates your result instantly from the values you enter, using standard date & time formulas. Business Days Calculator counts the weekdays between two dates and reports business days, total calendar days, and weekend days for the inclusive range. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Business Days Calculator
The Business Days Calculator tells you how many working days sit between two dates. It counts every Monday to Friday in the range and separates them from weekend days.
Both the start and end dates are included, so a Monday-to-Friday span counts as five business days.
Formula & Mathematical Calculation
start = new Date(sraw + 'T00:00:00')
end = new Date(eraw + 'T00:00:00')
Derived directly from the verified calculation function in the tool engine.
Calculation Example
For a start date of Mon 2 June 2025 and an end date of Sun 15 June 2025:
- Calendar days (inclusive): 14
- Weekdays: 2–6 June (5) plus 9–13 June (5) = 10 business days
- Weekend days: 14 − 10 = 4
The boxes show 10 Business Days, 14 Calendar Days, and 4 Weekend Days.
Key Benefits
- Separates working days from weekends across any date range
- Includes both the start and end dates in the count
- Reports calendar days and weekend days alongside the business-day total
- Explains the result in a plain-language sentence
How to Use this Calculator
-
Select the start date
Pick the first day of the range in the Start Date field. -
Select the end date
Pick the last day in the End Date field; it must be on or after the start date. -
Calculate
Press Calculate and read the Business Days, Calendar Days, and Weekend Days boxes.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Business Days Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.