Power Calculators: Free HP, kW & Torque Conversion Tools
Calculate mechanical power for any application with our free online power calculators. Whether you are converting between horsepower and kilowatts for a motor specification, determining the power required to drive a pump, or calculating engine output from torque and RPM data, these tools deliver precise results instantly. Enter your torque, rotational speed, force, velocity, or electrical input to receive power output in watts, kilowatts, horsepower, and BTU per hour. Each calculator includes efficiency factors for motors, engines, and transmissions, plus unit conversions between metric and imperial systems for global engineering compatibility. Mechanical engineers, automotive technicians, and HVAC designers use these tools to size equipment correctly, avoid underpowered installations, and optimize energy consumption. From small electric motors to industrial diesel engines, our power calculators cover every mechanical power need. No signup required—access from any device and design efficient power systems with confidence.
