BCBetter Calculators

Work Hours Calculator

Calculate how many hours you worked in a day after accounting for breaks.

🧮

Enter your values and click Calculate

How It Works

Start and end times are each converted to total minutes since midnight (hour × 60 + minute). The gross shift length is the difference between end and start minutes. If the end time is earlier than or equal to the start time — indicating an overnight shift — 1,440 minutes (24 hours) is added to the end to account for the midnight crossing. Net minutes equals gross shift minutes minus break minutes. Hours worked equals net minutes divided by 60. The H:MM format uses the integer part of that division as whole hours and the remainder modulo 60 as minutes. For example, a 9:00 start, 17:30 end, and 30-minute break gives 510 gross minutes minus 30 = 480 net minutes, which is 8.00 decimal hours displayed as 8:00. The gross shift minutes output shows the raw clock time before break deductions, allowing direct cross-checking against time-clock records.

Examples

09:00 to 17:30 with 30 min break
A standard office working day with a lunch break.
Result: 8 hours worked (7.5 hrs gross shift minus 0.5 hr break).
22:00 to 06:30 with 45 min break
An overnight shift crossing midnight.
Result: 7.75 hours worked (8.5 hrs gross overnight shift minus 45 min break).
07:15 to 13:00 with no break
A half-day or morning-only shift without a break.
Result: 5.75 hours worked.

Frequently Asked Questions

Does this support overnight shifts?
Yes. If your end time is before your start time, the calculator automatically adds 24 hours to account for midnight crossings. For example, a shift from 10 PM to 6 AM is correctly calculated as 8 hours.
How do I enter 9:30 AM in 24-hour format?
Set Start Hour to 9 and Start Minute to 30. For afternoon times, use the 24-hour equivalent: 1:45 PM = hour 13, minute 45. Midnight is hour 0, noon is hour 12.
Can I calculate hours for billing purposes?
Yes, the decimal hours output is ideal for multiplying by an hourly rate. For example, 7.75 hours × $40/hr = $310 in billable earnings. The H:MM format is useful for timesheets that require hours and minutes separately.

Related Calculators

life✨

Time Duration

Calculate the number of days and weeks between two dates.

Calculate →
life✨

Hours to Days

Convert a number of hours into days, weeks, and minutes.

Calculate →