Effective Torque is often referred to as wheel torque or torque to the wheels is primarily associated with automotive tuning. Torque can be measured using a dynamometer

Dynamometer

A dynamometer or "dyno" for short, is a device for measuring force, moment of force , or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed .A dynamometer can also be used to determine...

. Common units used in automotive applications can include ft·lbf and N·m. For more on units see: Foot-pound force

Foot-pound force

The foot-pound force, or simply foot-pound is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and Imperial units of measure. It is the energy transferred on applying a force of 1 pound-force through a displacement of 1 foot...

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Effective torque will often be 5-15% lower than the shaft or crank ratings of an engine due to a loss through the drivetrain.

For a general article please see: Machine torque.