Time Duration Calculator
Calculate the exact hours and minutes between two times in a day.
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Enter your values and the result appears here
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About this calculator
How many hours are between 9 AM and 5 PM? How about from 10:30 PM to 6:15 AM? Our time duration calculator makes it easy. Enter a start time and end time, and we calculate the exact hours, minutes, and total minutes between them. It handles overnight durations (when the end time is earlier than the start) and gives you the result in both decimal hours and hours:minutes format.
The formula, explained simply
We convert both times to total minutes since midnight, then subtract the start from the end. If the result is negative (meaning the end time is on the next day), we add 24 hours (1,440 minutes). The result shows the duration in hours (decimal), hours and minutes separately, and total minutes. Perfect for work shifts, travel time, or any time interval calculation.
When you would use this
Employees track work hours and calculate overtime. Students figure out study session lengths. Travelers calculate flight or road trip durations. Event coordinators plan schedules. Freelancers bill clients by the hour. Anyone managing their time gets precise duration calculations.