Time Duration Calculator

Calculate elapsed hours, minutes, and seconds between two clock times with midnight handling.

Your tool input is processed locally in your browser and is not sent to our servers.

Time Duration & Elapsed Hours

Start Time (HH:MM:SS)

End Time (HH:MM:SS)

Elapsed Duration

8h 30m 0s

Decimal Hours:

8.5 hrs

Total Minutes:

510 mins

Total Seconds:

30600 secs

Calculates the exact elapsed time between start and end clock times, automatically adjusting for shifts that cross midnight.

Enter the starting time (HH:MM:SS).
Enter the ending time (HH:MM:SS).
View the duration in formatted hours, minutes, seconds, decimal hours, and total seconds.

Elapsed Seconds = End Time in Seconds - Start Time in Seconds (+ 86400 if crossed midnight)

Times are converted to absolute seconds from midnight for precise subtraction.

Shift starting at 08:30 AM and ending at 05:15 PM.

Input: 08:30:00 to 17:15:00

Output: 8 hours, 45 minutes (8.75 decimal hours)

Shift starting at 10:00 PM and ending at 06:30 AM next day.

Input: 22:00:00 to 06:30:00

Output: 8 hours, 30 minutes (Next day)

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