Time Duration Calculator
How long between two clock times, including spans that cross midnight.
How it counts
The duration runs forward from the start time to the end time. If the end is earlier on the clock (22:30 to 06:15), it is taken to be the next day: 7 hours 45 minutes, not a negative span. For durations over 24 hours you need dates, not just clock times; use the days between dates calculator for that.
Duration vs. hours worked
This page measures pure elapsed time. If you're filling a timesheet and need to subtract a lunch break or multiply by an hourly rate, the hours calculator does both.