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About This Tool
The Time Duration Calculator adds or subtracts hours and minutes to find total elapsed time. Enter a start time and end time, or add multiple durations together to get the combined total.
This tool is particularly useful for tracking billable hours, calculating shift lengths, planning travel itineraries, or totaling workout sessions. It handles overnight calculations correctly when the end time crosses midnight.
Results are displayed in both hours:minutes format and as a decimal value (e.g., 2 hours 30 minutes = 2.50 hours), which is handy for timesheet reporting and invoicing where decimal hours are the standard format.