Hours Calculator
Calculate the duration between two times — for a shift, a task, or a work week. Results show in hours:minutes and decimal hours, with an optional unpaid break deduction.
Duration: ?
Frequently asked questions
How many hours is 9 to 4?
9 AM to 4 PM is 7 hours. With a 30-minute unpaid lunch it is 6.5 decimal hours (6:30). Use the calculator above to include your own break.
How do I calculate hours between two times?
Convert both times to minutes since midnight, subtract, then divide by 60. Example: 9:00 to 17:30 = (17.5×60 − 9×60) ÷ 60 = 8.5 hours.
Does the calculator handle overnight shifts?
Yes. If the end time is earlier than the start time, it assumes the shift crosses midnight and adds 24 hours to the duration.