This calculator allows you to convert from Pferdestarke (ps) to Femtojoule/second and in a reverse direction. To convert from Pferdestarke (ps) to Femtojoule/second, enter the amount of Pferdestarke (ps) into the first input and to convert from Femtojoule/second to Pferdestarke (ps), enter the amount of Femtojoule/second into the second input.