Engine and Performance

5 tools

Which Engine and Performance tool do you need?

Tool	What it answers
Horsepower Calculator	Horsepower equals torque in lb-ft times engine speed in rpm, divided by 5,252.
Horsepower to Torque	Torque in lb-ft equals horsepower × 5252 divided by engine speed in rpm.
HP Calculator	Horsepower equals torque in lb-ft times engine speed in rpm, divided by 5252.
Torque Calculator	Torque equals power divided by rotational speed.
Torque to Horsepower	Horsepower equals torque in lb-ft times rpm divided by 5,252.

Work out engine horsepower from torque and rpm, or estimate wheel horsepower from quarter-mile ET or trap speed and race weight. Shows kW and PS too.

Convert engine horsepower, kW or PS at a given rpm into torque in lb-ft and N·m using T = hp × 5252 ÷ rpm, with the working shown line by line.

Work out engine horsepower from torque and rpm (hp = torque × rpm ÷ 5252), or estimate it from quarter-mile time or trap speed and race weight.

Convert engine power and rpm into torque in lb-ft, N·m and kgf·m. Accepts hp, kW or PS and shows the 5252 rpm working step by step.

Convert engine torque and rpm to horsepower, kilowatts and metric PS. Works in lb-ft or N·m; 300 lb-ft at 5,252 rpm equals exactly 300 hp.