Business hours
H = N × (hc − ho)
N counts Monday-to-Friday dates between the two dates, both included.
Business Hours Calculator
Add up the hours inside your Monday-to-Friday working window between two inclusive dates, weekends excluded.
Check the dates and hours: the last day cannot be before the first, and the closing time must come after the opening time on the same day.
Business time
- First day
- Last day
- Business day starts → Business day ends
- In minutes
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How does this tool work?
How many working hours fit between two dates? For every Monday-to-Friday date between the first and last day you enter, the calculator adds the length of your daily working window. Saturdays and Sundays are skipped. The result is shown in hours and minutes and as total minutes, which helps you size a workload, a team’s capacity, a service’s opening time or a commitment expressed in business hours.
The tool walks through every calendar date from the first to the last day, both included. Saturdays and Sundays are ignored; for every other day it counts the time between opening and closing. The sum is rounded to the minute.
The hours apply to every day: the first day starts at opening time and the last day ends at closing time. With 9:00-17:00, each business day is worth 8 hours, so the total is simply the number of weekdays times 8 hours.
The window must fit inside one day: a closing time at or before the opening time (a 22:00-06:00 night shift, for instance) is rejected. Public holidays are not removed automatically, because they depend on the country, the region and the employer.
How to use this tool
Pick the first day
Hours are counted from this date; if it falls on a weekend, it does not count.
Pick the last day
It is included. It can be the same as the first day to measure a single day.
Enter your working hours
Set the usual opening and closing times, for example 09:00 and 17:00.
Read the total and adjust for holidays
The result shows hours, minutes and the dates used; remove one day’s window for each weekday holiday.
Business hours formula
The total only depends on how many weekdays the range contains and on the length of the daily window.
Removing public holidays
H′ = H − F × (hc − ho)
Apply it yourself for each public holiday that falls on a weekday in the range.
- N
- number of Monday-to-Friday dates between the first and last day, inclusive
- ho, hc
- opening and closing time of the daily window
- F
- public holidays off work that fall on a weekday in the range
- H′
- business hours once holidays are removed
A Saturday-Sunday weekend is a convention: the Unicode CLDR week data list, for example, a Friday-Saturday weekend in several Middle Eastern countries.
Use cases
Size someone’s capacity
A person working 9:00 to 17:00 from 5 to 16 October 2026 has 10 business days, so 80 hours to plan.
Count a service’s opening time
A front desk open 8:30 to 12:00 Monday to Friday totals 17 h 30 a week.
Prepare an hourly quote
Turn an engagement period into an hour count before applying your hourly rate.
Check a service commitment
See how many business hours a deadline expressed in calendar days actually covers.
Examples
A week of mornings
5 business days × 3 h 30 = 17 h 30.
Input
Monday 5 to Friday 9 October 2026, 08:30-12:00Result
17 h 30 min (1,050 min)A range that includes a weekend
Saturday 10 and Sunday 11 are skipped: only Friday and Monday count, 2 × 8 h.
Input
Friday 9 to Monday 12 October 2026, 09:00-17:00Result
16 h 00 min (960 min)Tips and best practices
- For split hours (9:00-12:00 then 14:00-18:00), run two calculations and add them, or enter one continuous window and subtract the break times the number of business days.
- The calculator counts time inside the window, not effective working time: breaks that sit inside the window are still counted.
- If you only need the number of weekdays, the business days calculator is more direct; for a single day with a break, use the work hours calculator.
- Dates are read in your device’s time zone; clock changes happen at night, outside a normal day window, so daylight saving time does not affect the result.
Sources and references
Frequently asked questions
What counts as a business day here?
Monday to Friday. Saturdays and Sundays are always excluded, and public holidays are not removed automatically.
Are public holidays deducted?
No. They vary by country, region and employer. Subtract one day’s window for each holiday that falls on a weekday in the range.
Can I start in the middle of a day?
Not directly: each day counts the whole window. To start at 14:00 on the first day, remove the part of the window before 14:00, or run a separate calculation for that day.
Are the first and last days included?
Yes, both are counted when they are weekdays. From one Monday to the next, you get 6 business days.
How do I count night shifts such as 22:00-06:00?
That case is not supported, because the window must start and end on the same day. Work out one night with the work hours calculator, then multiply by the number of nights.
What if my weekend is not Saturday and Sunday?
The calculator always skips Saturday and Sunday. For another rest day, count those days yourself and adjust the total by one day’s window each.
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