Calculates addition and subtraction of multiple times.

You can easily add and subtract multiple times.

Enter hours, minutes, and seconds, select addition or subtraction, and click the "Calculate time" button to display the time calculation results.

If you want to calculate more than one time, click the "↓Increase" or "↑Reduce" button to calculate multiple times.

The calculation results will display the elapsed time as "Hour, Minute, Second" and Hours conversion, Minutes conversion, Seconds conversion.

If it exceeds 24 hours, the time converted to "Day hour minute second" will also be displayed.

Clicking the "Clear" button will set all entered times to 0.