The Hours Calculator answers a deceptively simple question: how much time is there between two clock times? It handles the parts people get wrong by hand — breaks, overnight shifts, and converting minutes into the decimal hours payroll actually uses. It is the lighter companion to a full time card: enter two times, optionally a break, and read the duration three ways.
How the Hours Calculator works
Times are minutes since midnight. Add 1,440 minutes if the end is earlier than the start or Ends next day is selected, then subtract the break. A break longer than the elapsed span is invalid; an equal break gives zero. Equal start and end times mean zero hours unless Ends next day is selected, when they mean 24 hours.
Minutes, decimal hours, and 12h vs 24h
The single most common payroll error is mixing up minutes and decimal hours. Forty-five minutes is 0.75 of an hour, not 0.45. The conversion is always minutes ÷ 60. This tool shows both at once so you never have to guess. The 12-hour/24-hour toggle is about display and input convenience — internally the math is identical. If AM/PM ever trips you up, switch to 24-hour: there is no noon-vs-midnight ambiguity on a 24-hour clock.
Payroll, time cards, and where to go next
For a single span or a quick day-of blocks total, this calculator is all you need. If you also need to apply an hourly rate, overtime rules, or a weekly schedule, reach for a dedicated time card or timesheet tool — this is the lighter, single-purpose sibling. To work with whole calendar dates instead of clock times, see the Date Duration Calculator, and for converting one unit of time into another use the Time Converter.