Measure the elapsed time between two clock times, including overnight spans.
elapsed time
How to use this tool
The moment the span begins.
The moment it ends — overnight spans are handled automatically.
Hours and minutes, plus totals in minutes, seconds and decimal hours.
8.25 hours is the payroll-friendly form of 8h 15m.
Formula & worked example
From 09:30 to 17:45 is 8h 15m — 495 minutes, or 8.25 hours. From 22:00 to 06:00 overnight is 8h 00m.
Limitations — read this before you rely on it
This measures clock-time elapsed within a single span under 24 hours; it does not handle dates, time zones or daylight-saving changes. For shifts with breaks and pay, use the Time Clock Calculator.
Frequently asked questions
Subtract the start from the end; if the end is earlier, add 24 hours. 09:30 to 17:45 is 8 hours 15 minutes.
Yes — 22:00 to 06:00 gives 8 hours, not a negative number.
This tool measures pure elapsed time. The Time Clock Calculator subtracts breaks and adds pay, which is what shifts need.
No — it covers spans under 24 hours. For multi-day spans, use a date duration calculator.
8.25 hours: 15 minutes is a quarter of an hour.