Calculate working days between dates or add business days to a date. Excludes weekends for accurate project planning and deadline tracking.
Last updated: March 2026
Business days (also called working days, weekdays, or business working days) are Monday through Friday, excluding weekends. This standard applies to most commercial operations, government offices, and corporate environments in Western business culture. When calculating project timelines, delivery dates, or processing times, business days provide a realistic measure that accounts for non-working weekends.
The distinction matters because promises like "5 business days" mean 5 weekdays, which could span 7-9 calendar days depending on where weekends fall. A request made on Thursday requiring 3 business days won't be completed until Tuesday (Friday +1, Monday +2, Tuesday +3), not Sunday. This calculator automates that mental math, ensuring accurate planning.
Note that this calculator uses the standard Monday-Friday definition and does not account for public holidays, which vary by country and year. For precise business day calculations in specific jurisdictions, you may need to manually subtract holidays from the result.
Count business days from Monday, March 2, 2026 to Friday, March 13, 2026 (inclusive):
No, this calculator only excludes weekends (Saturday and Sunday). Public holidays vary by country and year, so you'll need to manually account for them in your specific region.
Use the 'Add Days' mode with your end date as the start, then manually navigate to your calculated date. Or use date-to-date mode and enter dates in reverse order—the calculator counts the same either way.
No. This calculator uses the Western Monday-Friday standard. Some countries have Friday-Saturday weekends (Middle East), or different working week structures. Always verify local conventions.
In 'Count Between' mode: YES, both dates are included if they're weekdays (inclusive counting). In 'Add Days' mode: NO, counting starts from the day after the start date—adding 1 business day to Friday gives you Monday, not Friday.
The calculator uses your local browser time zone. For cross-timezone projects, specify dates in your project's reference timezone for consistency.
Yes, but remember that SLAs often specify whether holidays are included, and some use 24/7 time (not business days). Review your specific SLA terms.
If today is Friday, '1 business day' is Monday (skipping the weekend). The calculator handles this automatically when adding business days.
Work weeks are calculated as business days ÷ 5. If your organization has 4-day weeks or alternative schedules, adjust the interpretation accordingly.
Related Tools
Calculate vacation days.
Calculate project deadlines.
Calculate travel time.
Calculate age from birth date.
Calculate age gap between dates.
Calculate baby's age precisely.