Count the number of working days (business days) between two dates, excluding weekends and — optionally — a list of public holidays. Also works the other way around: add or subtract N working days from a given date to find the deadline. Pick which days count as weekend (Sat–Sun for most countries, Fri–Sat for Saudi Arabia / Egypt / Gulf countries), paste your holiday list, and the tool returns the exact number of workdays, calendar days and the target date. Perfect for project deadlines, SLAs, notice periods, delivery estimates and payroll cut-offs.
How to use Working Days Calculator
1
Enter Your Values
Fill in the input fields — the working days calculator accepts numbers, dates, or units depending on the mode.
2
Choose the Calculation Mode
Pick the operation or unit you want (add, subtract, percentage, convert) using the toggles above the inputs.
3
See the Result Live
The answer updates instantly as you type; no need to click a "calculate" button.
4
Copy for Your Records
Copy the result to your clipboard or take a screenshot for reports, invoices, or homework.
Why Use Working Days Calculator
Doing this calculation by hand every time is a waste of your attention. Working Days Calculator keeps the math boring and correct so you can focus on the decision it feeds into. The formulas are transparent, the inputs are forgiving, and every result is deterministic — the same inputs always produce the same answer, which matters when you need to defend a number to a client or a manager. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Working Days Calculator follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
Tips & Best Practices
1Double-check the units and time zones — a wrong unit is the single most common source of a wrong answer.
2For legal or financial decisions, always confirm the result against your accountant, lawyer, or the primary source.
3Round only at the final step; intermediate rounding compounds into a surprisingly large error.
4Save the input values along with the result if you might need to audit the calculation later.
5Try the edge cases (zero, negative, very large) to build intuition for how the formula behaves.
Frequently asked questions
Can I set Friday–Saturday as the weekend?
Yes. Weekend days are configurable — pick Sat/Sun (most countries), Fri/Sat (Saudi Arabia, Egypt, UAE before 2022, most Gulf states), Sun only, or any custom combination — before the tool counts the workdays.
How do I add public holidays?
Paste one date per line (YYYY-MM-DD) in the holidays field. Dates that fall on a weekend are ignored to avoid double-counting, and each remaining holiday is subtracted from the working-day total.
Does it work for adding working days to a date too?
Yes. Switch to the ‘add / subtract working days’ mode, enter a start date and a positive or negative N, and the tool jumps forward or backward N business days — skipping weekends and holidays — to give you the target date.
Do I need to create an account to use Toolzer?
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Is Toolzer safe to use with sensitive inputs?
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Does Toolzer work on mobile?
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Can I link to or bookmark a result?
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
