Time Duration Calculator
Last updated: October 15, 2026
Calculate elapsed hours and minutes between two times.
Elapsed time
—
- Total minutes: —
- Decimal hours: —
On this page
Quick summary: Calculate elapsed hours and minutes between two times.
Read the method, example and limitations
Updated reference sections in this guide are in English.
Guide language: English. Updated October 15, 2026.
What this calculator estimates
The Time Duration Calculator measures elapsed time between two clock times or date-time values and can express the result in hours, minutes, and seconds.
Inputs and units
Enter Start time, End time. Use the units shown. Required fields cannot be blank. Use zero only where that field and the model allow it. Select Calculate after changing the values.
Method and assumptions
Subtract the start time from the end time in whole minutes. If the end clock time is earlier, assume the next day. Display the resulting hours and minutes, total minutes and decimal hours.
Worked example
23:30 to 01:15 is 1 hour 45 minutes, or 105 minutes and 1.75 hours. Equal start and end times represent zero duration.
Limitations
Times must be from 00:00 to 23:59. This clock-only form cannot express multiple days, time-zone changes or daylight-saving transitions.