Time Duration Calculator

Calculate shift lengths, event durations, and decimal hours from clock times.

Result

Inputs and calculations remain in this browser tab.

How it works

Elapsed time subtracts the start from the end. When an end time is earlier and next-day mode is selected, the calculator adds 24 hours before deducting any break.

Using the result

Decimal hours are useful for timesheets: 30 minutes is 0.5 hour, while 45 minutes is 0.75 hour.

Important limitation

Confirm whether breaks are paid before deducting them from working time.