If a fastener has a torque limit of 30 ft-lbs, and your torque wrench is calibrated in in-lbs, what is the equivalent torque value in in-lbs?

If a fastener has a torque limit of 30 ft-lbs, and your torque wrench is calibrated in in-lbs, what is the equivalent torque value in in-lbs?

• A. 30 in-lbs
• B. 360 in-lbs
• C. 3600 in-lbs
• D. 3 in-lbs

Answer: (B)

Converting torque from feet-pounds to inch-pounds is about multiplying by 12, since there are 12 inches in a foot. A torque limit of 30 ft-lbs equals 30 × 12 = 360 in-lbs. So the equivalent torque value in inch-pounds is 360, which is what a wrench read in in-lbs would show for that limit. If you saw 30 in-lbs, that would be only 2.5 ft-lbs; 3600 in-lbs would be 300 ft-lbs; and 3 in-lbs would be 0.25 ft-lbs—none match the given 30 ft-lbs.

Converting torque from feet-pounds to inch-pounds is about multiplying by 12, since there are 12 inches in a foot. A torque limit of 30 ft-lbs equals 30 × 12 = 360 in-lbs. So the equivalent torque value in inch-pounds is 360, which is what a wrench read in in-lbs would show for that limit. If you saw 30 in-lbs, that would be only 2.5 ft-lbs; 3600 in-lbs would be 300 ft-lbs; and 3 in-lbs would be 0.25 ft-lbs—none match the given 30 ft-lbs.