Business Days Calculator

How to use Business Days Calculator

1. Open Business Days Calculator in your browser — it loads instantly and works offline once cached.
2. Enter your values in the input fields. Every field is labelled so you know exactly what to type.
3. The result updates automatically as you type — there is no "submit" round-trip to a server.
4. Adjust any input to compare scenarios and see how the outcome changes in real time.
5. Copy or note the result. Nothing you enter is stored or sent anywhere.

Why use Business Days Calculator?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full date & time suite, so related business days tasks are one click away.

What people use Business Days Calculator for

• Calculating a delivery or SLA deadline in working days.
• Working out a notice period that excludes weekends.
• Planning a project timeline in business days.

Business Days Calculator: limits and things worth knowing

• Business days exclude weekends by default, but public holidays vary by country and often by region within a country, so a calculation is only as good as the holiday list applied.
• The working week is not Monday to Friday everywhere. Several Middle Eastern countries use Sunday to Thursday, and this catches out international deadlines.
• Contracts often specify 'clear days', which excludes both the first and last day. Read the definition rather than assuming.
• Bank holidays and public holidays are not always the same thing, and a service level may reference one specifically.

Is it private and secure?

Your privacy is built in. Business Days Calculator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.