Skip to content
Allin
Sign up · Sign in

Add business days calculator

Find the date a number of working days after a start date (weekends skipped).

Related tools

All Dates & time tools →
Business days calculatorCount the working days (Monday–Friday) between two dates.Add or subtract days from a dateFind the date a number of days before or after a starting date.Age in days calculatorConvert your age into total days, weeks and approximate years.Days until date calculatorCount the number of days from today until a future date.Days in a Month CalculatorThe number of days in any month of any year from 1 to 9999, the leap rule worked through line by line for February, the weekday of the 1st and of the last day, how many of each weekday the month holds, and the calendar itself.Date difference calculatorCount the days, weeks and months between two dates.Age calculatorWork out your exact age in years, months and days from your birth date.Countdown calculatorCount down the days and weeks remaining until an event.

Need Resulting date? The Add business days calculator derives it from Start date, Business days to add in one step. For instance, with Start date = 1985-03-20 and Business days to add = 10 it returns Resulting date = 03/04/1985.

How to use it

  1. Enter your values: Start date, Business days to add.
  2. Read the result instantly: Resulting date.

Frequently asked questions

What does the Add business days calculator actually compute?

It takes Start date and Business days to add and derives Resulting date 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 Business days to add. Nothing else is required — no account, no file upload.

Can you show a worked example?

With Start date = 1985-03-20 and Business days to add = 10, the calculator returns Resulting date = 03/04/1985. 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 Add business days calculator and the Business days calculator?

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

Is there a tool for the next step?

Add or subtract days from a date is the closest one after this: Find the date a number of days before or after a starting date.

What else is worth having open alongside it?

Age in days calculator 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.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 Add and Subtract Time (Hours and Minutes)Add and subtract hours and minutes reliably. Learn to carry over 60, borrow when subtracting, and handle a result that crosses midnight into the next day.How-toHow Many Days Have I Been Alive? Count Days, Weeks and MonthsYour age in days is the whole number of days between your birth date and today. Learn how to count it by hand, convert it to weeks and months, and why leap years matter.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.