Working Days Calculator — Free Online Tool
Count business days between dates, excluding weekends & holidays. · No signup · Works on mobile
100% private: your data is processed in your browser. Nothing is uploaded to our servers.
How to use the working days calculator
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Select the start and end dates of your period.
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Optionally add public holidays (one per line) to exclude them too.
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Read the working-day count — or switch modes to add working days to a date.
What does this tool do?
This free working days calculator counts business days between two dates, automatically excluding Saturdays and Sundays — and any public holidays you add. It's the fast way to compute project deadlines, notice periods, payroll days, and delivery estimates in business days.
How does the working days calculator work?
The tool iterates every calendar day in your range, skipping days whose weekday is Saturday or Sunday and any dates in your custom holiday list. You can also flip the mode to add N working days to a start date to find a deadline.
Frequently Asked Questions
How many working days are in a year?
A 365-day year contains 52 weekends (104 days), leaving 261 weekdays. Subtracting typical public holidays gives roughly 249–253 working days in the US (11 federal holidays), around 253 in the UK (8 bank holidays), and 245–250 in India depending on the state.
What does "within 5 business days" actually mean?
Business days are Monday–Friday excluding public holidays. If a bank says funds arrive within 5 business days and you initiate on Thursday, the counting runs Fri, Mon, Tue, Wed, Thu — arriving the following Thursday, a full calendar week later. Use the "add working days" mode to compute this.
Is the working days calculator really free?
Yes — 100% free with no hidden charges, trial limits, or premium tiers for core features. You don't need to create an account or enter an email address. The site is supported by non-intrusive display ads, which keeps every tool free for everyone.
Is my data private when using the working days calculator?
Completely. The working days calculator runs entirely in your browser using JavaScript — nothing you type or upload is sent to our servers. When you close the tab, your data is gone. This makes it safe for confidential documents, financial figures, and personal information.
Does the working days calculator work on mobile phones?
Yes. The working days calculator is built mobile-first and works on any phone or tablet with a modern browser — iPhone (Safari), Android (Chrome), and everything in between. The layout adapts to small screens, so buttons and inputs stay easy to tap on a 375px-wide display.
Do I need to install anything to use the working days calculator?
No. The working days calculator works directly in your web browser — no downloads, no extensions, no signup. Just open the page, use the tool, and get your result instantly. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.