Free Calculators for U.S. business days.
Pick a calculator: 1. Business days from today / 2. Business days between two dates counter.
Business days from today.
You have a start date and need to land on a date X business days away. Forward or backward, with the calendar drawn out for proof.
Open "X" Business Days From Today CalculatorBusiness days between two dates.
You have two fixed dates and need to know exactly how many working days lie between them. Calendar days, weekends and holidays separated out.
Open Business Days CounterWhat counts as a business day in the U.S.?
There's no single federal statute that defines "business day" for all purposes, but the working definition used by most U.S. courts, banks and federal agencies is consistent.
Definition A business day is any Monday through Friday that is not a U.S. federal holiday. Saturdays and Sundays are excluded.
This is the same definition the Federal Reserve uses for clearing days, the SEC uses for filing deadlines, and the U.S. Office of Personnel Management uses to schedule the federal workforce. Most contracts, SLAs and court rules in the United States adopt it by reference, either explicitly or by industry convention.
Both calculators on this site use this definition by default. If your contract treats Saturdays as working days or doesn't observe certain holidays, you can override the rules with the toggles inside each tool.
A quick decision guide.
Both tools answer questions about business days, but they start from different inputs. Pick by what you know.
Reach for the date finder when…
- A contract says "respond within 30 business days."
- A court rule gives you 14 business days to file.
- You promised a client delivery in 10 working days.
- You're tracking a regulatory comment period.
- You need to subtract back from a known deadline.
Reach for the range counter when…
- Counting working days remaining until a launch.
- Auditing whether a vendor hit their SLA window.
- Planning hourly billing or contractor invoices.
- Calculating PTO impact across a date range.
- Building a project plan with realistic capacity.
Why business days matter more than calendar days.
Calendar days are easy to count but rarely match how American business actually operates.
The rule of thumb is wrong about a third of the time
People often estimate "30 business days" as "about six weeks." That's close in months with no holidays — but in November and December, a 30-business-day window can stretch to 45 calendar days once Thanksgiving and Christmas fall inside it. In May and July it can be even longer because of Memorial Day and Independence Day. The mismatch between intuition and the calendar is exactly what these tools exist to fix.
Holidays don't always land on the printed date
When a federal holiday falls on a Saturday, federal employees observe it the Friday before. When it falls on a Sunday, they observe it the following Monday. This rule is set by 5 U.S.C. § 6103 and applied consistently across U.S. business. Both calculators on this site apply observance shifts automatically — so July 4, 2026 (a Saturday) is treated as observed on Friday July 3.
Industries that depend on this distinction
Legal practice runs on business-day deadlines: court rules in nearly every U.S. jurisdiction define filing periods in business days, with explicit carve-outs for federal holidays. Banking and securities settlement work the same way — the standard T+1 stock settlement window means one business day, not one calendar day. Construction contracts, government procurement, insurance claims, refund windows and inspection contingencies all use business days as their unit of time.
The cost of getting it wrong
Misreading a business-day deadline as a calendar-day deadline is one of the most common — and most expensive — calendaring errors. Missed court filings can be dispositive. Missed contract deadlines can void rights. The two calculators here exist precisely so this never has to be done by hand on a sticky note.