Business Days Calculator
Use this free Business Days Calculator to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Use this free business days calculator to count working days between two dates, excluding weekends, with optional added holidays.
Calculator Inputs
About Business Days
Use this free Business Days Calculator to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Business Days Calculator — Working Days Between Any Two Dates: This tool counts the number of business days (weekdays excluding Saturday and Sunday) that fall between two dates. It also shows the total calendar days and the number of weekend days, so you can see exactly how the counts compare. By default, both the start and end dates are included in the count. This free calculator runs instantly offline with no signup required ever, completing in seconds in your browser.
The algorithm iterates day by day from the start date to the end date, checking each day's weekday. If the day is Saturday (6) or Sunday (0) and weekend exclusion is enabled, it counts as a weekend day. Otherwise, it counts as a business day. The total is the sum of business and weekend days, which equals the calendar day count between the two dates.
The "include both start and end dates" option controls whether the boundaries are counted. When enabled (default), both the start date and end date are included in the total. When disabled, the tool counts only the days between them. For example, counting from Monday 09/15/2026 to Friday 09/19/2026 inclusive gives 5 business days; exclusive gives 3.
This is essential for project planning, SLA tracking, and payroll calculations. An Austin project manager starting a $40,000 contract on 09/15/2026 needs to know that 30 business days lands on 10/27/2026 — not 10/15/2026 (which is only 22 business days). A Miami shipping coordinator estimating 5 business days for a $8,000 order starting 09/15/2026 gets 09/22/2026 as the delivery target.
All calculations run in your browser with zero server calls, zero data storage, and zero accounts. No date data is transmitted or logged. Whether you are a Denver lawyer computing 20 business days for a $100,000 court filing, a Seattle school administrator counting 60 business days for a semester starting 09/15/2026, or a New York analyst projecting a $200,000 quarterly review, this free tool counts business days instantly offline with no signup required ever.
Where it is used
An Austin project manager counting 30 business days for a $40,000 milestone on a 09/15/2026 kickoff, a Chicago HR team calculating 10 business days for a $50,000 hiring process, a Miami shipping coordinator estimating 5-day delivery for a $8,000 order, a Denver lawyer computing 20 business days for a $100,000 court filing, a Seattle school administrator counting 60 business days for a semester, and a New York analyst projecting 45 business days for a $200,000 quarterly review.
How to use the Business Days
- Start date — enter the value.
- End date — enter the value.
- Exclude weekends (Sat & Sun) — enter the value.
- Include both start and end dates — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Examples
One work week
Two weeks
Spanning a holiday weekend
Frequently Asked Questions
- Does this tool account for public holidays?
- No — holidays vary by country and year. The tool handles weekends only. Subtract any public holidays that fall within the range manually for accurate counts.
- Is the last day included in the count?
- Yes by default — "Include both start and end dates" counts both boundaries. Turn it off to count the days between them (excluding the end date).
- What if the start date is after the end date?
- The tool returns an error message. Swap the dates so the start is before the end, or enter them in the correct order.
- Does it handle different weekend definitions?
- The tool assumes Saturday and Sunday as the weekend. For regions with Friday-Saturday weekends (Middle East), disable weekend exclusion and count manually.
- How is "total calendar days" calculated?
- Calendar days include every day from start to end, including weekends. It equals business days + weekend days and represents the actual elapsed time.
- Can I use this for payroll calculations?
- Yes — count the business days in a pay period to determine pro-rated salary. The tool gives you the exact working day count for any date range.