How to Convert Torque from Foot-Lbs to Inch-Pounds

If the manufacturer specifies that a terminal lug be torqued to 7.5 foot-lbs but your torque wrench is calibrated in inch-pounds, what setting should you use? The correct setting to convert torque from foot-lbs to inch-pounds is option a. 90. Let's dive into the detailed explanation below.

Understanding Torque Measurement

Torque is a measure of the twisting force needed to rotate an object. In the context of engineering and mechanics, torque is often specified in units such as foot-pounds (ft-lbs) or inch-pounds (in-lbs).

Converting Foot-Pounds to Inch-Pounds

When converting from foot-pounds to inch-pounds, you need to remember that 1 foot-pound is equal to 12 inch-pounds. Therefore, to convert foot-pounds to inch-pounds, you simply need to multiply the foot-pound value by 12.

Calculating the Conversion

In this case, the manufacturer specifies a torque of 7.5 foot-pounds. To convert this value to inch-pounds, we multiply 7.5 by 12:

7.5 ft-lbs × 12 in-lbs/ft-lb = 90 in-lbs

Setting Your Torque Wrench

Therefore, to achieve the specified torque of 7.5 foot-pounds with a torque wrench calibrated in inch-pounds, you should set your wrench to 90 inch-pounds.

By setting your torque wrench to 90 inch-pounds, you will be applying the equivalent torque of 7.5 foot-pounds as specified by the manufacturer.

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