Business Days Calculator

Get the exact number of weekdays (Monday-Friday) between two dates, alongside the full calendar-day breakdown.

Estimates only, not professional advice. This calculator is provided for general informational purposes and uses standard, documented formulas (shown in the sections below). It doesn't account for every factor a lender, employer, physician, or other professional would consider for your specific situation — verify important decisions with a qualified professional before relying on these numbers.

Shipping estimates, processing windows, and "X business days" contract language all mean weekdays only, excluding weekends. Enter a start and end date to see the business-day count directly, next to the total calendar-day figure for comparison.

How it works

  1. Enter your start and end date

    Pick both dates using the date pickers, or type them directly.

  2. Read the business days figure

    The result shows business days (Monday-Friday only) as one of the calculated stats, alongside total calendar days, weeks, months, and years.

  3. Compare against calendar days

    Seeing both numbers side by side makes it clear how many weekend days fall within your range.

  4. Bookmark or share the result

    Your two dates are saved in the page URL, so the link preserves your exact calculation.

Why business days matter more than calendar days for many timelines

Calendar-day counts include weekends, which don’t reflect actual working or processing time for most business operations. A shipping estimate of “5 business days” placed on a Wednesday actually spans a full calendar week once the intervening weekend is included, which is why timelines quoted in business days consistently feel longer than the number suggests if you’re only thinking in calendar days. This calculator surfaces both numbers together specifically so the gap between them is visible.

How the business-day count is calculated

The calculator walks every calendar day in your range and checks whether it falls on a weekday (Monday through Friday) or a weekend (Saturday or Sunday), counting only the weekday total. This is a straightforward and widely-used baseline definition — it doesn’t attempt to guess or apply public holidays, since those vary enormously by country, region, and industry, and a wrong guess would be worse than a clearly-labeled weekday-only count that you can adjust yourself.

Adjusting for holidays manually

If your specific use case needs to exclude public holidays as well as weekends — a common requirement in contract and legal deadline calculations — check your relevant holiday calendar (which varies by country and sometimes by state or region) and subtract those dates from the calendar range, or subtract the holiday count from the business-days result shown here if none of the holidays overlap with what’s already excluded as a weekend.

Common uses

Shipping and delivery estimates, contract and legal deadline calculations (“respond within 10 business days”), payroll and invoicing processing windows, and project scheduling that only counts working days are the most common reasons to need a business-day count instead of a calendar-day count.

Frequently asked questions

What counts as a "business day" in this calculator?

Monday through Friday, inclusive of both the start and end date if they fall on weekdays. This is a pure weekday count and doesn't subtract public holidays, since holiday calendars vary significantly by country and region — it's the baseline definition most shipping and processing-time estimates use before adjusting for specific holidays.

Does this account for public holidays?

No — it counts weekdays only. If your calculation needs to exclude specific public holidays as well, subtract those dates manually from the business-day result, since holiday calendars differ by country, region, and even by organization.

Why do businesses quote timelines in business days instead of calendar days?

Most processing, shipping, and service operations don't run on weekends, so "5 business days" is a more accurate estimate of actual working time than "5 days," which would include up to two non-working weekend days depending on when the count starts.

If my start date is a Saturday, does it still count toward business days?

No — only Monday through Friday dates count toward the business-days total, regardless of whether your start or end date happens to fall on a weekend.

Can I use this to add business days to a single date instead of comparing two dates?

This mode compares two existing dates. To add a number of business days to a single starting date and find the resulting date, that's a slightly different calculation — for now, use the add-days-to-date calculator with calendar days and manually account for weekends, or estimate by adding roughly 1.4x the business-day count in calendar days.

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