Business Days Calculator

What Is a Business Day?

A business day (also called a working day or workday) is any day that falls Monday through Friday and is not a public holiday. In the United States, this excludes the 11 federal holidays observed each year. Banks, courts, government offices, and most businesses operate exclusively on business days.

When a contract says "net 30 business days" or a government agency promises a response within "10 business days," they're referring specifically to this definition — weekends don't count, and neither do national holidays.

Business Days vs Calendar Days

Understanding the difference between business days and calendar days is essential whenever you're working with deadlines, contracts, or delivery windows.

Metric	Calendar Days	Business Days
Counts weekends?	Yes	No
Counts public holidays?	Yes	No
Days in a typical month	28–31	20–23
Days in a year (US)	365	~249
Common in contracts?	Sometimes	Very common

A simple example: "30 calendar days" from January 1st ends on January 31st. "30 business days" from January 1st lands somewhere in mid-February — nearly three weeks later — because weekends and the MLK Day holiday are excluded.

Quick Reference — Common Business Day Windows

These are approximate calendar timeframes for common business day counts, assuming no major holiday clusters:

Business Days	≈ Calendar Weeks	Typical Use
5 business days	~1 week	Standard shipping, short deadlines
10 business days	~2 weeks	Background checks, document processing
15 business days	~3 weeks	Government applications, permit reviews
20 business days	~4 weeks	Notice periods, probationary reviews
30 business days	~6 weeks	Invoice net-30 terms, contract deadlines
45 business days	~9 weeks	Real estate closing periods
60 business days	~12 weeks	Regulatory approval windows
90 business days	~18 weeks	Probation periods, long-term agreements

How to Use This Calculator for Business Days

This free online business days calculator is simple to use:

Enter a start date — e.g. today, an invoice date, or a contract start date
Enter an end date — a deadline, delivery date, or project milestone
Select your country — to automatically exclude national public holidays

The result updates instantly. As a business working days calculator, it excludes both weekends and public holidays, giving you the precise number of working days between the two dates.

Unlike a basic calendar business days calculator, this tool accounts for country-specific holidays — so a result of "30 business days" in the US may differ from the same date range in the UK or Canada.

Common Uses for a Calculator for Business Days

Invoice payment terms — "Payment due net 30 business days from invoice date" is one of the most common payment terms in B2B contracts
Legal and contract deadlines — court filings, notice periods, option expiry, and right-of-first-refusal windows all run on business days
Shipping and delivery estimates — carriers like FedEx, UPS, and USPS quote transit times in business days, not calendar days
Project planning — calculating available working hours before a launch date or sprint end
HR and payroll — tracking working days in a pay period, notice period, or probationary review window
Tax filing deadlines — the IRS and many state agencies specify deadlines in business days, and if a deadline falls on a weekend, it shifts to the next business day
Real estate transactions — closing periods, inspection contingency windows, and earnest money deadlines are always stated in business days
Government processing times — passport renewals, visa applications, and permit approvals all quote turnaround in business days

How Many Business Days Are in Each Month?

The number of business days varies each month based on how many weekends and public holidays fall in that period. Here's the approximate count for the US in a typical year:

Month	Typical Business Days (US)	Major Holiday Impact
January	20–21	New Year's Day, MLK Day
February	19–20	Presidents Day
March	21–23	None (federal)
April	21–22	None (federal)
May	20–22	Memorial Day
June	21–22	Juneteenth
July	21–23	Independence Day
August	21–23	None (federal)
September	20–22	Labor Day
October	22–23	Columbus Day
November	18–20	Veterans Day, Thanksgiving
December	21–23	Christmas Day

Public Holidays by Country

This calculator supports three countries. Public holidays vary significantly and reduce the business day count accordingly:

United States — 11 federal holidays: New Year's Day, Martin Luther King Jr. Day, Presidents Day, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving, and Christmas Day. When a holiday falls on a Saturday, it's observed on Friday; on Sunday, it's observed on Monday.
United Kingdom — 8 bank holidays in England & Wales: New Year's Day, Good Friday, Easter Monday, Early May Bank Holiday, Spring Bank Holiday, Summer Bank Holiday, Christmas Day, and Boxing Day. Scotland and Northern Ireland have slightly different sets.
Canada — 11 federal statutory holidays: New Year's Day, Good Friday, Victoria Day, Canada Day, Labour Day, National Day for Truth & Reconciliation, Thanksgiving, Remembrance Day, Christmas Day, and Boxing Day. Some provinces add additional holidays.

Frequently Asked Questions

What counts as a business day?

A business day is any weekday (Monday–Friday) that is not a public holiday. Weekends (Saturday and Sunday) and national holidays are not counted as business days.

Does this calculator include public holidays?

Yes. Select your country from the dropdown to automatically exclude that country's national public holidays from the business day count.

Is the start date included in the count?

Yes, this calculator uses inclusive counting — both the start date and end date are included if they fall on a business day.

How do I calculate business days between two dates?

Enter your start and end dates above and select your country. The calculator will instantly show the number of business days, excluding weekends and public holidays.

Can I use this for invoice or contract deadlines?

Absolutely. Business day counts are commonly used in legal contracts, payment terms, and project deadlines. Enter the start date of the agreement and the due date to get the exact business day count.

What is the difference between business days and calendar days?

Calendar days count every single day including weekends and holidays. Business days only count Monday–Friday, excluding public holidays. Over a typical month, this means roughly 21–23 business days out of 28–31 calendar days.

How many business days are in a month?

Most months contain between 20 and 23 business days, depending on the number of weekends and public holidays that fall in that month. February through April typically have the fewest due to holidays, while months like August often have the most.

What is 30 business days from today?

30 business days from today is approximately 6 calendar weeks away, but the exact date depends on weekends and public holidays in between. Use the calculator above — set today as the start date and count forward to find the exact end date.

How many business days are in a year?

A standard year has 260–262 working days (52 weeks × 5 weekdays), minus public holidays. In the US, subtracting 11 federal holidays leaves approximately 249–251 business days per year.

Do business days include Saturday?

No. Business days are Monday through Friday only. Saturday and Sunday are always excluded from business day counts, regardless of country.

What happens when a deadline falls on a weekend or holiday?

In most legal and financial contexts, when a deadline falls on a weekend or public holiday, it rolls over to the next business day. Always verify the specific rules in your contract or jurisdiction.