Inch Pounds to Foot Pounds

Fastener Mechanics & Imperial Torque Standards

In US Customary mechanical engineering, 1 foot = 12 inches, meaning 1 foot-pound of torque is equivalent to 12 inch-pounds of rotational moment.

Primary Imperial Torque Multipliers

• 1 Foot-Pound (ft-lb): 12 Inch-Pounds = 192 Inch-Ounces = 1.355818 N·m

• 1 Inch-Pound (in-lb): (1) / (12) Foot-Pound ≈ 0.08333 ft-lbs = 16 in-oz = 0.112985 N·m

• 1 Inch-Ounce (in-oz): = (1) / (16) in-lb = (1) / (192) ft-lb

Equations

• Foot-Pounds = Inch-Pounds12

• Inch-Pounds = Foot-Pounds × 12

How to Use This Calculator

Enter your Torque Value to Convert (e.g. 120.0) and Conversion Direction — choose from Inch-Pounds to Foot-Pounds (in-lbs → ft-lbs / divide by 12), Foot-Pounds to Inch-Pounds (ft-lbs → in-lbs / multiply by 12). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 ft-lb = 12 in-lbs

Worked Example

A transmission oil pan bolt specified at 120 in-lbs equals exactly 10.0 ft-lbs (13.56 N·m) of tightening torque.

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.