Work Days Calculator – Business Days Between Dates

This work days calculator counts business days between two dates — weekends excluded, holidays subtractable — for deadlines, SLAs, payroll periods and project plans.

Business Days = Days That Aren't Weekends (or Holidays)

The count blends calendar arithmetic with the social contract of the working week — Saturdays and Sundays vanish, holidays subtract, and what remains is the clock contracts and couriers actually run on. Forward planning to a date itself is the Days Until Calculator's countdown. Part of our Everyday Life Calculators collection.

Worked Example (Verified Against the Calendar)

• Wed Oct 21 → Fri Oct 30, 2026 (defaults): 9 calendar days, 2 weekend days (Sat 24, Sun 25), 7 work days — Thu 22, Fri 23, Mon 26–Fri 30
• The classic SLA: "3 business days" from Friday = Wednesday (Mon 1, Tue 2, Wed 3) — weekends stretch real time by up to 2 days, the eternal Friday-ticket phenomenon
• Full weeks compress beautifully: any 7-day span holds exactly 5 weekdays + 2 weekend days, so long ranges count as weeks × 5 + the partial-week tail — the check your spreadsheet formula must reproduce
• Holiday density: late-December two-week spans can lose 4+ weekdays to holidays in many countries — the manual holiday field is small but mighty

Convention Traps

• "Within 10 business days" in shipping/customs law usually excludes the trigger day and includes the deadline — the convention used here; HR accrual systems sometimes count inclusively — one-day discrepancies are conventional, not errors.
• Half-days, regional holidays (state, cantonal, prefectural), and company shutdowns aren't universal — adjust the holiday count rather than arguing with the calendar.
• Weekend definitions differ globally (Fri–Sat weekends in parts of the Middle East) — this tool uses Sat–Sun; shift workers' "business days" are a roster question, not a calendar one.
• Time zones don't matter for whole-day counting — dates are dates; timestamps matter only for hour-level tools.

Related Tools

• Date Calculator — add/subtract days and span totals
• Time Card Calculator — hours within the work days
• Everyday Life Calculators — the full collection

Frequently Asked Questions

How do I count business days between two dates?

Count every day after the start date through the end date, skipping Saturdays, Sundays and (optionally) holidays. Oct 21 → Oct 30, 2026 gives 7 work days. This calculator walks the calendar day by day so leap years and month lengths need no special cases.

Does "5 business days" include today?

Usually no: the trigger day is day zero, and counting starts tomorrow. Five business days from Wednesday Oct 21, 2026 is Wednesday Oct 28. If your context counts the start day (some payroll/HR systems do), add one when the start is a weekday — the page explains the convention it uses so you can translate.

How many work days are in a year?

About 260–262 weekdays (52 weeks × 5 = 260, plus the year's extra 1–2 days depending on which weekdays they land), minus public holidays — US federal employees land near 250 working days; other countries' counts differ by their holiday calendars.

Why do couriers quote delivery in business days?

Because their networks (like banks and courts) pause on weekends and holidays: a "3 business day" service shipped Friday typically delivers Wednesday. The convention is operational honesty, though it reads like delay — this calculator converts the promise into a calendar date you can plan around.

What about half-days and partial weeks?

Whole-day counting is the standard for deadlines and SLAs. For capacity planning in hours, multiply work days by your shift length via the Time Card Calculator, or subtract known half-days (holiday eves, summer Fridays) manually from the day count here.

Is this work days calculator free?

Yes — free, instant, no sign-up.