Hours Calculator

Calculate time duration or add/subtract hours and minutes.

Calculation Type:

Start Time:

End Time:

Assumes times are on the same day or within a 24-hour period crossing midnight.

How to Use

Select Calculation Type ('Duration', 'Add', or 'Subtract').
For Duration: Enter Start Time and End Time.
For Add/Subtract: Enter Starting Time, and the Hours/Minutes to add or subtract.
Click "Calculate".
The result (duration or new time) will be displayed.

Time Calculation Logic

Duration: Calculates the difference between the end time and start time in total minutes, then converts back to hours and minutes. Handles crossing midnight (assumes end time is next day if earlier than start time).

Add/Subtract: Converts the starting time and the hours/minutes to add/subtract into total minutes, performs the addition/subtraction, and then converts the resulting total minutes back into a standard time format (HH:MM).

Hours Calculator

Result:

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