Business Days Between Dates Calculator
Count working days between two dates, excluding weekends and optionally holidays. Perfect for SLA deadlines, notice periods, and delivery estimates. Free, instant.
Contracts, SLAs, notice periods, and payment terms all run on business days — but counting them by hand across a calendar is slow and error-prone. "Net 30 business days" from a Friday in mid-November is a very different date from 30 calendar days later.
Enter the start and end dates to get the working-day count with weekends excluded, and add your own holiday list to exclude regional days off. The tool also answers the reverse question: what calendar date lands exactly N business days from today.
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Business Day Calculator
Calculate working days between dates with custom holidays. Exclude weekends and holidays. SLA, contract, and project planning. 100% local.
This tool runs 100% in your browser. All computation happens locally on your device — your input is never uploaded to any server. Results are for reference only.
How business-day counting works — illustrated
A business day is any day your team actually works: Monday through Friday, minus any holidays that fall on a weekday. The count is a simple subtraction — total calendar days, then take out every Saturday and Sunday, then take out the holidays that landed on a weekday. Two details trip people up. First, a holiday that falls on a weekend (like July 4, 2026, a Saturday) costs no working day on its own, but an observed weekday off (July 3, 2026) does. Second, the same holiday list can't be reused across companies, which is why this tool lets you add custom holidays alongside the US federal calendar.
Each workday cell below is counted; Saturday and Sunday are always excluded, and a weekday holiday (shown in amber) is excluded too. For the range Jan 1 – Mar 31, 2026: 90 total days − 26 weekend days − 3 weekday holidays (Jan 1, Jan 19, Feb 16) = 61 business days — the stacked bar shows the split.
A marketing agency is quoting a delivery deadline from January 1 to March 31, 2026, and needs the number of working days the team actually has, counting US federal holidays.
- Total calendar days:90 days between Jan 1 and Mar 31, 2026
- Weekend days:26 — every Saturday and Sunday is excluded from the count
- Weekday holidays:3 — Jan 1 (New Year’s Day), Jan 19 (MLK Jr. Day), Feb 16 (Presidents’ Day) all fall on weekdays
- Business days:90 − 26 − 3 = 61 working days for the project
About this business days between dates
This page covers working days calculator, how many business days between two dates, add business days to date, weekdays between dates — all the same underlying task as business days between dates. The tool above is FreeToolHub's business day calculator embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
How do I count business days between two dates?
Count every weekday (Monday–Friday) in the range, then subtract any public holidays that fall on those weekdays. From a Monday to the Friday ten calendar days later there are 8 business days — the two weekends contribute zero.
Does the count include the start date?
Conventionally the start date is excluded and the end date is included — delivery "in 3 business days" ordered on Monday means Thursday. This calculator labels both ends explicitly so there is no ambiguity in contracts or estimates.