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Business Days Calculator

Count the working days between two dates, skipping weekends and (optionally) public holidays. Choose US federal or UK bank holidays, or weekends only.

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Quick answer

Business Days is a free, private online tool that lets you count working days between two dates, excluding weekends and US federal or UK bank holidays. It runs entirely in your browser, so nothing you enter is uploaded to a server.

How to use the Business Days

  1. Choose the start and end dates.
  2. Pick a holiday calendar — weekends only, US federal or UK bank holidays.
  3. Read the number of business days, total calendar days and holidays excluded.
  4. Adjust the dates or calendar to recalculate.

Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.

About Business Days

Why business days matter

Project deadlines, SLAs and payment terms are usually measured in working days, not calendar days. This tool counts Monday–Friday and subtracts recognised public holidays.

Holiday calendars

Pick US federal holidays (with weekend observation rules) or UK bank holidays (including Good Friday and Easter Monday, computed automatically). Or choose weekends-only to ignore holidays.

What it reports

You get the number of business days, the total calendar days (inclusive) and how many public holidays fell in the range.

Frequently asked questions

Are both the start and end dates counted?
The range is inclusive of both endpoints; weekends and selected holidays are then removed from the working-day total.
Which holidays are included?
US: the 11 federal holidays with Saturday/Sunday observation. UK: England & Wales bank holidays including Easter-based dates.
Can I count weekends only?
Yes — choose "Weekends only" to ignore holidays entirely.

Understanding Business Days in depth

What a business days calculator does

A business days calculator counts the number of working days between two dates, excluding weekends and, optionally, public holidays. Because deadlines, payment terms and delivery estimates are usually measured in working days rather than calendar days, this is essential for accurate planning.

Working days versus calendar days

There is a big difference between calendar days and business days. A '10 business day' delivery window can span two weeks of the calendar once you remove Saturdays, Sundays and any holidays. This tool counts only Monday to Friday and subtracts recognised public holidays, so you get the figure that contracts and SLAs actually mean.

Built-in holiday calendars

The calculator can exclude US federal holidays (with the standard Saturday/Sunday observation rules) or UK bank holidays (including the Easter-based dates, which it computes automatically), or you can count weekends-only and ignore holidays. Choosing the right calendar matters because a span crossing several holidays can shift a deadline by days.

Why it matters in business

Service-level agreements, invoice payment terms ('net 30 business days'), legal notice periods, shipping estimates and project schedules are all defined in working days. Miscounting them - by forgetting a bank holiday, say - leads to missed deadlines and disputes. An accurate count protects against those errors and sets correct expectations.

How to use it

Pick a start and end date and a holiday calendar, and the tool reports the business days, total calendar days and how many holidays were excluded. To add or subtract a number of days from a date instead, use the Date Add/Subtract tool. Everything is calculated in your browser.

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