Find the elapsed time between two clock readings, including an interval that crosses midnight.
How to use this calculator
Enter each time as HH:MM, with optional seconds or AM/PM. Select the next-day option only when the end is on the following day.
Example. 22:30 to 06:15 the next day is 7 h 45 min. Equal times give zero on the same day, or 24 h with next day selected.
Uses a 24-hour day. Time zones and daylight saving changes are outside this calculation.