How long is the gap between 08:30 and 17:15? This calculator takes two clock times and returns the duration in hours, minutes, seconds and decimal format. Handles overnight spans across midnight.
Duration Calculator - Time Between Two Clock Times
How long is the gap between 08:30 and 17:15? This calculator takes two clock times and returns the duration in hours, minutes, seconds and decimal format. Handles overnight spans across midnight.
Parameters
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Two clock times in, one number out
The Duration Calculator measures the gap between two clock times. Enter a start time and an end time, and it returns the elapsed duration in hours and minutes, as a decimal value, and in total minutes and seconds. It handles overnight spans that cross midnight - just check the box and the calculator adds 24 hours automatically.
How to calculate duration - step by step
- Start time - enter the beginning time in 24-hour format, e.g. 08:00 for 8 AM or 14:30 for 2:30 PM.
- End time - enter the ending time in the same format, e.g. 17:15 for 5:15 PM.
- Crosses midnight - if your end time is on the next day (like a night shift from 22:00 to 06:00), check this box.
- Read the results - hours, minutes, decimal hours, total minutes, total seconds and the full time range.
Common durations at a glance
Reference table for work shifts, meetings and daily routines:
| Start | End | Duration | Decimal | Context |
|---|---|---|---|---|
| 08:00 | 16:00 | 8 hr 0 min | 8.00 | Standard work day |
| 08:30 | 17:15 | 8 hr 45 min | 8.75 | Shift with overtime |
| 09:00 | 09:45 | 0 hr 45 min | 0.75 | Meeting / class period |
| 22:00 | 06:00 | 8 hr 0 min | 8.00 | Night shift (across midnight) |
| 06:15 | 14:45 | 8 hr 30 min | 8.50 | Early morning shift |
| 13:00 | 13:20 | 0 hr 20 min | 0.33 | Lunch break |
Decimal hours and why they matter
Payroll, invoicing and project tracking often require time in decimal format. Converting 8 hours and 45 minutes to 8.75 makes multiplication straightforward: 8.75 x $25/hr = $218.75. Here is the conversion for common minute values:
| Minutes | Decimal hours | Minutes | Decimal hours |
|---|---|---|---|
| 5 | 0.08 | 35 | 0.58 |
| 10 | 0.17 | 40 | 0.67 |
| 15 | 0.25 | 45 | 0.75 |
| 20 | 0.33 | 50 | 0.83 |
| 30 | 0.50 | 55 | 0.92 |
Practical examples
Result: 8 hr 30 min (8.50 decimal hours, 510 minutes)
Result: 8 hr 30 min (8.50 decimal hours, 510 minutes)
Result: 1 hr 30 min (1.50 decimal hours, 90 minutes)
Result: 0 hr 25 min (0.42 decimal hours, 25 minutes)
Result: 3 hr 45 min (3.75 decimal hours, 225 minutes)
Result: 8 hr 30 min (8.50 decimal hours, 510 minutes)
FAQ - Frequently asked questions
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