Date calculators · Workdays & planning
Business Hours Calculator
Count the hours your calendar actually has. Leave out closed days and lunch, and see how each working date contributes.
Your calculation
Ready when you are
Choose your dates.
Select your counting rules and calculate.
Calculation details
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How to use this calculator
Enter starting and ending dates and times. Choose your working weekdays, select a country holiday calendar or enter closures, and add one to four daily working periods. Leave a gap between periods for lunch. Choose scheduled wall-clock hours or actual elapsed hours in a time zone, then calculate.
Partial opening and closing days count only where your date-time range intersects a working period. Touching or overlapping periods merge so a minute is never counted twice. Periods must stay within one day; 24:00 is accepted as a closing boundary. The selected daily schedule applies to every selected weekday. Endpoints are exclusive durations, not extra counted minutes.
A worked example
For Friday November 6, 2026 at 16:00 through Monday November 9 at 11:00, a Monday–Friday 09:00–12:00 and 13:00–17:00 calendar contains three business hours: one on Friday and two on Monday.
How is this different from the Work Hours Calculator?
Work Hours measures one entered shift or interval and subtracts a break. Business Hours applies recurring opening periods, weekends and holidays across multiple dates. It is useful for office availability, turnaround estimates and support calendars; it does not infer a contract or payroll policy.
Further reading: Atlassian working-calendar concepts. Your entered rules determine this result.
Which calendar and years are supported?
Dates are supported from 1900 through 2100, with at most 366 days between inputs. Scheduled hours ignore clock changes. Elapsed mode uses your browser's time-zone rules, rejects nonexistent boundaries and asks you to choose repeated times. The occurrence choice applies to all boundaries. Choose automatic country and region holidays or enter closures manually; automatic coverage varies by year.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.