Time Duration Calculator
Standard Formula
Elapsed Time = Stop Time - Start Time
Calculates precise elapsed time between any two daily timestamps.
How Time Duration Calculator Works?
The Time Duration Calculator works by subtracting the start time from the end time and showing the gap in hours and minutes, total minutes and decimal hours.
1Enter the start time
Use decimal 24-hour format: 9.25 = 9:15 AM.
2Enter the end time
Use decimal 24-hour format: 17.75 = 5:45 PM.
3Read the elapsed time
The tool returns 8h 30m (8.50 hours).
4Check total minutes
The tool shows 510 minutes for the same span.
Time Duration Calculator Formula
The Time Duration Calculator formula is Elapsed Time = End Time − Start Time.
Elapsed decimal hours
Elapsed = End − Start
Elapsed minutes
Minutes = Elapsed × 60
- Start, End
- Times of day in 24-hour decimal format, same day.
- Elapsed
- Duration between the 2 times.
Worked example: 6:40 AM to 3:10 PM
Start = 6.6667, End = 15.1667. Elapsed = 8.5 hours (8h 30m, 510 minutes).
Time Duration Calculator Conversion Table
The Time Duration Calculator conversion table shows elapsed time for 10 same-day start and end pairs.
| Start | End | Elapsed (h:m) | Decimal Hours | Total Minutes |
|---|---|---|---|---|
| 6:00 AM | 2:30 PM | 8h 30m | 8.50 | 510 min |
| 7:00 AM | 3:30 PM | 8h 30m | 8.50 | 510 min |
| 7:30 AM | 4:00 PM | 8h 30m | 8.50 | 510 min |
| 8:00 AM | 12:00 PM | 4h 0m | 4.00 | 240 min |
| 8:00 AM | 4:30 PM | 8h 30m | 8.50 | 510 min |
| 8:45 AM | 5:15 PM | 8h 30m | 8.50 | 510 min |
| 9:00 AM | 5:00 PM | 8h 0m | 8.00 | 480 min |
| 9:15 AM | 5:45 PM | 8h 30m | 8.50 | 510 min |
| 10:00 AM | 6:30 PM | 8h 30m | 8.50 | 510 min |
| 1:00 PM | 9:30 PM | 8h 30m | 8.50 | 510 min |
What is Time Duration Calculator?
A Time Duration Calculator is a tool that measures the elapsed time between 2 clock times on the same day.
The calculator answers "How many hours from 9:15 AM to 5:45 PM?" The answer, 8.5 hours, excludes breaks. Subtract unpaid meal time for net work hours.
For shifts that cross midnight, an overnight method adds 24 hours to the end time.
What are the uses of Time Duration Calculator?
There are 4 main uses of the Time Duration Calculator.
Shift length
Workers compute hours between clock-in and clock-out.
Meeting and event length
Planners measure session duration.
Travel time
Employees log compensable travel time between job sites.
Task timing
Teams measure how long a job took from start to finish.