Calculate the exact amount of time between two clock times. Enter a start time and an end time to see the duration in hours, minutes, total minutes, and decimal hours.
This calculator is useful for measuring work hours, study sessions, appointments, meetings, travel periods, event durations, breaks, and other activities that have a defined start and end time.
Select the time when the activity starts and the time when it ends. The calculator will determine the elapsed duration.
A time duration calculation tells you how much elapsed time exists between a starting point and an ending point. Rather than simply subtracting the displayed clock numbers, this calculator converts both times into minutes and calculates the difference.
Used when the end time occurs later on the same day. For example, 9:00 AM to 1:30 PM is 4 hours 30 minutes.
Used when the activity passes midnight. For example, 11:00 PM to 3:00 AM is 4 hours.
Understanding a couple of examples makes it easier to use the calculator correctly.
Here is the exact duration between your selected times.
The values below show how the duration was determined.
Calculate the length of a work shift, meeting, appointment, training session, or other scheduled activity.
Measure study sessions, revision periods, examination preparation time, or the length of individual learning activities.
Estimate how long an event, journey segment, appointment, or scheduled activity lasts.
Track exercise sessions, sleep periods, breaks, household activities, or other routines.
Decimal hours are useful when entering time into payroll, accounting, spreadsheets, or other systems that require hours to be represented as a decimal number.
Decimal hours are different from clock notation. For example, 1.30 decimal hours is not the same as 1 hour 30 minutes. The calculator converts minutes correctly by dividing the total number of minutes by 60.
This calculator measures the elapsed time between two clock times. It does not automatically account for:
For a simple same-day or single overnight period, the calculator provides the elapsed duration directly.
This calculator performs the time calculation in your browser. Your selected times do not need to be sent to a server for the calculation to work. This makes it convenient for quickly calculating durations without creating an account or submitting personal information.
Use the calculator whenever you need a quick and clear measurement of elapsed time. It is particularly useful when the result needs to be expressed both as conventional hours and minutes and as decimal hours for records or calculations.
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