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Business Days Calculator: Working Days Between Dates

This free business days calculator counts the working days between two dates or adds a number of working days to a date. It skips weekends and any holidays you type in.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

A business day is a normal working day, usually Monday to Friday without public holidays. Deliveries, payments, contracts and legal notices are often measured in business days. The number of calendar days is then longer than it looks.

This tool counts business days between two dates, or finds the date that is a number of business days away.

How to Use This Tool

  1. Choose to count between dates or to add business days.
  2. Enter the dates or the number of days.
  3. Add holidays to skip, one per line, if you have any.
  4. Press Calculate.

How the Calculation Works

The calculator steps through the calendar one day at a time. A day counts only if it is not a Saturday or Sunday and is not in the holiday list. When adding, it moves forward until the requested number of counting days is reached.

Worked Example

Starting Monday 2 November 2026 and adding 10 business days lands on Monday 16 November 2026. Between 2 November and 30 November 2026 there are 20 business days.

Common Uses

  • Delivery and shipping estimates.
  • Payment and refund deadlines.
  • Legal and contract notice periods.
  • Project planning.

Tips and Common Mistakes

  • List local holidays for an accurate answer.
  • A holiday on a weekend does not change the count.
  • Dates can be typed as 2026-12-25.

Next, you may need the date difference calculator, date add and subtract calculator, days until calculator, time card calculator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

Monday to Friday, excluding public holidays. Some countries use a different working week, which this tool does not cover.
No. Holidays differ by country and year, so you add the ones you need in the holiday box, one date per line.
When adding days, counting starts the day after the start date. When counting between dates, the start date is not counted and the end date is.
Banks may use their own holiday lists and cut-off times. Add their holidays to match.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.