LegalDeadlineTools

Business Days Calculator

Count the business days between two dates, excluding weekends and any court or office closures you specify.

Last reviewed

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Free · No sign-up · Runs in your browser

The gap between calendar days and business days grows faster than intuition suggests. Thirty calendar days is about twenty-one business days; ninety calendar days is roughly sixty-four. Over a long matter the two measures diverge by weeks.

This calculator counts both between any two dates, excluding weekends and whatever closures you list, so a schedule built in one convention can be checked against the other.

Your numbers

Results update as you type. Nothing is sent anywhere.

One date per line as YYYY-MM-DD.

Result

Business days

86

Calendar days

120

Weekend and closure days
34
Weeks
17.1
Months
3.9
Closures counted
0
Start date on a weekend?
No
End date on a weekend?
No

This tool performs arithmetic on the values you enter. It does not provide legal advice and does not create an attorney-client relationship.

The count excludes the start date and includes the end date. Courts differ on this convention - check the rule that governs your count.

Add court holidays and office closures to the closure list; they are not built in because they differ by court and by year.

How to use the business days calculator

  1. Enter the start date and the end date.
  2. List any court holidays or office closures that fall between them.
  3. Read the business day count alongside the calendar day total.
  4. Check whether either date falls on a weekend before relying on the count.

What people use this for

  • Checking whether a schedule expressed in business days is achievable.
  • Converting a calendar-day rule into working days for planning.
  • Measuring elapsed working time on a matter.
  • Comparing two schedules written in different conventions.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

A working week

Monday 2 March 2026 to Friday 6 March 2026.

Business days
4
Calendar days
4
Weekend and closure days
0

A quarter with closures

Two March to thirty June 2026, excluding two listed court holidays.

Business days
84
Calendar days
120
Closures counted
2

The counting convention

This calculator excludes the start date and includes the end date, which is the most common convention for day-count rules. Courts differ, and some rules count inclusively at both ends.

The difference is a single day, which is exactly the kind of discrepancy that matters on a filing deadline. Check which convention the governing rule uses before applying the result.

Closures are not built in

Court holiday schedules differ by court, by jurisdiction and by year, and a built-in list would be wrong more often than it was right. Entering them explicitly is slower and considerably more reliable.

The practical approach is to keep the current year’s court calendar to hand and paste the relevant dates in. It takes seconds and it removes the most common source of error in a business-day count.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

  • Business days exclude Saturdays, Sundays and any closure dates listed. The start date is excluded and the end date included.
  • Calendar days are the raw difference between the dates. Weeks and months are derived from the calendar day count.
  • No court holiday data is built in; closures must be supplied.
  • The tool performs arithmetic or date counting on the values you enter. It does not interpret a rule, a statute or a contract.
  • Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This website provides general informational and productivity tools and does not provide legal advice or create an attorney-client relationship.

The date and deadline tools count days exactly as you instruct them. They do not interpret court rules, statutes of limitation, filing requirements or any other legal authority, and they do not know the rules of your jurisdiction.

Always verify any date, fee, or calculation against the governing rule, the court calendar and your own professional judgement. If you need legal advice, consult a lawyer licensed in your jurisdiction.

Frequently asked questions

Are business days the same as court days?

Not necessarily. Some courts treat certain days as non-filing days that are ordinary business days elsewhere. Add those as closures.

Does the start date count?

Not in this calculator. It excludes the start date and includes the end date, which is the most common convention - but not a universal one.

How do I handle a half-day closure?

Treat it according to whether filings are accepted. If the registry is open, it is a business day; if not, list it as a closure.

Can I use this outside a legal context?

Yes. The arithmetic is the same for any working-day count - project schedules, notice periods, service level agreements.

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