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Business days calculator

Count the working days (Monday–Friday) between two dates.

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The Business days calculator turns Start date, End date into Business days, Total days, instantly and for free. For instance, with Start date = 1985-03-20 and End date = 1985-03-20 it returns Business days = 1 and Total days = 1.

How to use it

  1. Enter your values: Start date, End date.
  2. Read the result instantly: Business days, Total days.

Frequently asked questions

What does the Business days calculator actually compute?

It takes Start date and End date and derives Business days and Total days from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

2 values: Start date and End date. Nothing else is required — no account, no file upload.

Can you show a worked example?

With Start date = 1985-03-20 and End date = 1985-03-20, the calculator returns Business days = 1 and Total days = 1. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

When would I actually use this?

Answering a scheduling question exactly: how many working days until a deadline, what date falls sixty days out, and what time that is for a colleague elsewhere.

What is the most common mistake?

Counting days by subtracting dates and forgetting whether the endpoints are included. Inclusive and exclusive counts differ by one, which is the difference between meeting a deadline and missing it.

What is the difference between the Business days calculator and the Add business days calculator?

This one returns Business days and Total days; the Add business days calculator returns Resulting date. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Age in days calculator is the closest one after this: Convert your age into total days, weeks and approximate years.

What else is worth having open alongside it?

Add or subtract days from a date and Days until date calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from, and how current are they?

Calendar arithmetic follows the proleptic Gregorian calendar and the IANA time-zone database, so daylight-saving transitions and leap years are handled. Public holidays vary by country and region and are not assumed.

Further reading

All guides →
How-toHow to Count Business DaysBusiness days are weekdays minus holidays. Here's what counts, how to work them out between two dates, why holidays complicate it, and where it matters.ExplainerHow Many Working Days Are There in a Year?A year has roughly 260 weekdays before holidays. Learn where that number comes from, why it varies by country, and how public holidays bring it down to the working days you actually get.How-toHow Many Days Between Two DatesSubtract the earlier date from the later, minding month lengths and leap years. Here's how to count it, and whether to include both endpoints.How-toHow to Add or Subtract Days from a DateCount forward to add, backward to subtract, rolling over month ends. Here's how, why month lengths and leap years trip you up, and when weekends count.How-toHow to Calculate Your AgeSubtract your birth year from this year, then take one off if your birthday hasn't come yet. Here's the rule, the common mistake, and how to get an exact age.ExplainerWhat Week Number Is It?Week numbers run from 1 to 52 or 53. Here's how the ISO 8601 system numbers them, why some years have 53 weeks, and where businesses use them.