Engine Power Converter

This free tool enables the easy conversion of imperial power to metric power and imperial torque to metric torque and vice versa. Most importantly, it performs an accurate view of power before or after transmission losses.

This is the only online tool that does this


1. Select your driveline configuration: 

2. Select your induction type: 

3. Enter your power and/or torque number in the relevant field then click on Calculate

  kW   kW   kW
  Bhp   Bhp   Bhp
  Nm   Nm   Nm
  lb/ft   lb/ft   lb/ft


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The Metric System

The metric system, also known as the International System of Units (SI), is a decimal-based system of measurement. It revolves around three fundamental units: Metre (length), Kilogramme (mass), Watt (power).

Nearly every country in the world has embraced the metric system, including major nations like Australia, Canada, France, Japan, and Spain. Its simplicity and consistency make it a preferred choice for scientific research, industry, and everyday life.

The Imperial System

The imperial system, on the other hand, is rooted in British history. It includes units like the inch, the mile, and the pound. The British Imperial System was officially used in Great Britain from 1824 to 1965.

Interestingly, the United States Customary System (USCS) is closely related to the British Imperial System, and the U.S. still employs it today. However, only three countries persist with the imperial system: Liberia, Myanmar, and the United States.

Historical Context

The British Imperial System emerged as a unifying force for Great Britain, replacing various local measurement systems. Meanwhile, the metric system gained prominence globally.

Why doesn't the U.S. fully adopt the metric system? When the U.S. established its customary system, the metric system wasn't as widespread. Transitioning an entire nation's infrastructure takes time and resources. Although the U.S. officially uses the customary system, metric education is widespread, and many tools display both metric and imperial units.