Business Days Calculator

What this calculator does

Every input on this business days calculator maps to a real decision, so the output is something you can act on immediately, not a rough ballpark you'll have to double-check elsewhere.

Counts Monday through Friday between two dates.

Purpose-built for a specific decision — not a generic template.

Includes a copy-ready summary and printable PDF view.

Runs entirely in your browser — no data leaves your device.

Result updates live as you type — no "Calculate" button needed.

How to use the Business Days Calculator

Enter your values in the fields on the left.
Results update automatically.
Use action buttons to copy, share or print.

The formula

Iterate day by day, exclude weekends.

Worked example

Jan 1 to Feb 1 2024 = 24 business days.

Common mistakes

Holidays not excluded
Different work weeks (M-Sat)
Timezone confusion

When to use it

Use for SLAs, project timelines, contracts.

Pro tips for the Business Days Calculator

Round-trip check: reverse the inputs to confirm the formula matches what you'd compute by hand.
Bookmark this page: the URL and inputs are all you need to reproduce the exact result later.
Save your favorite scenarios by clicking the star icon — they're stored locally, no account needed.

Frequently asked questions

›Holidays?

Not counted here.

›Include start/end?

Inclusive.

›Different countries?

Weekends vary — Saturday-Sunday assumed.

›Working days percent?

About 5/7 = 71%.

›Half days?

Not modeled.

›Is the Business Days Calculator free to use?

Yes. Every calculator on CalcPilot, including the Business Days Calculator, is free with no sign-up, no watermark, and no export limit.

›Can I use this on mobile?

Yes — the business days calculator is fully responsive, and results, charts, and the share button all work on phones and tablets.

Embed this calculator

Drop the Business Days Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.

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