Convert Foot-pound force per second to Horsepower (ft-lb/s to HP):
Choose the right category from the selection list, in this case 'Power'.
Next enter the value you want to convert. The basic operations of arithmetic: addition (+), subtraction (-), multiplication (*, x), division (/, :, ÷), exponent (^), brackets and π (pi) are all permitted at this point.
From the selection list, choose the unit that corresponds to the value you want to convert, in this case 'Foot-pound force per second [ft-lb/s]'.
Finally choose the unit you want the value to be converted to, in this case 'Horsepower [HP]'.
Then, when the result appears, there is still the possibility of rounding it to a specific number of decimal places, whenever it makes sense to do so.