Duration converter
Convert hours, minutes, and seconds into total seconds, minutes, and hours.
Loading the tool… JavaScript is required for processing on your device. The instructions and examples below are available without JavaScript.
How to use it
Enter non-negative duration parts to see each total.
Good to know
Minutes and seconds can be greater than 59; they are added to the total.
Combine duration parts into totals
Enter non-negative values for each part. 1 hour, 30 minutes, and 0 seconds becomes 5400 seconds, 90 minutes, and 1.5 hours.
Use it for elapsed time, not clock time
Minutes and seconds may be greater than 59 because the tool adds all three parts into one duration. For example, 90 minutes is treated as the same duration as 1 hour and 30 minutes.
Negative values are rejected. This calculator does not subtract one clock time from another or account for time zones; use a time-sheet or calendar tool for a schedule with start and end times.