Hours calculator
How long is it from one time to another? Enter a start and an end and get the answer in hours and minutes and in decimal hours, with any unpaid break already taken off.
Spans that cross midnight
A span ending earlier than it starts is assumed to run overnight, so 11:00 PM to 7:00 AM is eight hours. That is almost always what was meant on a shift, and reporting a negative number never is.
Converting to decimal hours
Divide the minutes by 60 rather than moving the decimal point. Fifteen minutes is 0.25 hours, twenty is 0.33, forty-five is 0.75. Writing 7 hours 30 minutes as 7.30 instead of 7.5 understates the time by twelve minutes.
Minutes to decimal hours
The conversion payroll systems expect. Divide by 60 — do not simply move the decimal point.
| Minutes | Decimal hours | Written as |
|---|---|---|
| 5 minutes | 0.08 | 5m |
| 10 minutes | 0.17 | 10m |
| 15 minutes | 0.25 | 15m |
| 20 minutes | 0.33 | 20m |
| 25 minutes | 0.42 | 25m |
| 30 minutes | 0.5 | 30m |
| 35 minutes | 0.58 | 35m |
| 40 minutes | 0.67 | 40m |
| 45 minutes | 0.75 | 45m |
| 50 minutes | 0.83 | 50m |
| 55 minutes | 0.92 | 55m |
Common questions
How many hours is 9 AM to 5 PM?
Eight hours, or 7.5 hours once a thirty-minute unpaid lunch is deducted.
How do I calculate hours worked with a break?
Work out the span between clock-in and clock-out, then subtract the unpaid break in minutes. An 8:00 AM to 4:30 PM shift with a 30-minute lunch is 8 hours.