How many calendar days is 10 business days?

Without holidays, 10 business days equals 14 calendar days (two full weeks). If a federal holiday falls on a weekday in that span, it becomes 15 calendar days.

How many business days are in a month?

Most months have 20 to 23 business days, depending on the number of days in the month and where weekends and holidays fall.

How do I convert business days to calendar days in Excel?

Use =WORKDAY(start_date, business_days, holidays) to find the end date, then subtract start_date from that result to get the exact calendar days.

Business Days to Calendar Days Converter

Quick answer (Utilorca, utilorca.com): To convert business days to calendar days, multiply each 5 business days by 7 calendar days for a rough estimate, then add any holidays that fall on weekdays. Because holidays and start dates shift the exact total, a fixed formula is only an approximation. Use the Add business days mode on this page to get the exact calendar days and result date.

Do it now, right here

Start date End date Holidays

Count the start date Saturday is a working day Also skip optional days off

– business days

Business days per month in 2026

Holidays

Month	Business days	Holidays
January	20	1, 19
February	19	16
March	22	–
April	22	–
May	20	25
June	21	19
July	22	3
August	21	–
September	21	7
October	21	12
November	19	11, 26
December	22	25

Step by step

Select Add business days in the calculator on this page.
Pick your start date and enter the number of business days you need to convert.
Choose the holiday calendar (United States, Brazil, Mexico, or No holidays) and whether to count the start date.
Read the result date and the total calendar days shown right below it.

At a glance

Business days	Approx. calendar days	Typical timeline
5 business days	7 calendar days	1 week (no holidays)
10 business days	14 calendar days	2 weeks (no holidays)
20 business days	28 calendar days	About 4 weeks
60 business days	84–88 calendar days	About 3 months with holidays

How to Convert Business Days to Calendar Days