Convert Torque from Pound-inches (lbf-in) to other units

Select a category and enter your values below

Pound-inch Conversion Formulas

Pound-inch to Newton-meter Conversion Formula

To convert from Pound-inch (lbf-in) to Newton-meter (Nm), use the following formula:

Newton-meter (Nm)

= 112 × 1.355818× Pound-inch (lbf-in)

= 0.11298483333333333333× Pound-inch (lbf-in)

With 1.355818 is the ratio between the base units Newton-meter (Nm) and Pound-foot (lbf-ft).


Pound-inch to Centinewton-meter Conversion Formula

To convert from Pound-inch (lbf-in) to Centinewton-meter (cNm), use the following formula:

Centinewton-meter (cNm)

= 112 × 1.355818 × 100× Pound-inch (lbf-in)

= 11.298483333333333333× Pound-inch (lbf-in)

With 1.355818 is the ratio between the base units Newton-meter (Nm) and Pound-foot (lbf-ft).


Pound-inch to Decinewton-meter Conversion Formula

To convert from Pound-inch (lbf-in) to Decinewton-meter (dNm), use the following formula:

Decinewton-meter (dNm)

= 112 × 1.355818 × 10× Pound-inch (lbf-in)

= 1.1298483333333333333× Pound-inch (lbf-in)

With 1.355818 is the ratio between the base units Newton-meter (Nm) and Pound-foot (lbf-ft).


Pound-inch to Kilogram-meter Conversion Formula

To convert from Pound-inch (lbf-in) to Kilogram-meter (kgm), use the following formula:

Kilogram-meter (kgm)

= 112 × 1.355818 × 19.806649999787735× Pound-inch (lbf-in)

= 0.011521246637310283405× Pound-inch (lbf-in)

With 1.355818 is the ratio between the base units Newton-meter (Nm) and Pound-foot (lbf-ft).


Pound-inch to Kilogram-centimeter Conversion Formula

To convert from Pound-inch (lbf-in) to Kilogram-centimeter (kg-cm), use the following formula:

Kilogram-centimeter (kg-cm)

= 112 × 1.355818 × 10.09806649999787735× Pound-inch (lbf-in)

= 1.1521246637310283405× Pound-inch (lbf-in)

With 1.355818 is the ratio between the base units Newton-meter (Nm) and Pound-foot (lbf-ft).


Pound-inch to Pound-foot Conversion Formula

To convert from Pound-inch (lbf-in) to Pound-foot (lbf-ft), use the following formula:

Pound-foot (lbf-ft)

= 112× Pound-inch (lbf-in)

= 0.083333333333333333333× Pound-inch (lbf-in)


Pound-inch to Ounce-inch Conversion Formula

To convert from Pound-inch (lbf-in) to Ounce-inch (ozf-in), use the following formula:

Ounce-inch (ozf-in)

= 112 × 10.005208333271755643× Pound-inch (lbf-in)

= 16.000000189166666941× Pound-inch (lbf-in)

What Is a Pound-inch (lbf·in)?

A pound-inch (lbf·in) is one pound-force applied at one inch from the axis of rotation. It is the small-torque companion to the pound-foot.

  • 1 lbf·ft = 12 lbf·in (exactly, since a foot is twelve inches)
  • 1 lbf·in = 0.112985 N·m

Why a Smaller Imperial Unit Exists

Many fasteners are tightened to far less than one pound-foot. Writing "0.4 lbf·ft" invites a decimal-point error on a shop floor; writing "5 lbf·in" does not. Small-torque work therefore uses inch units almost exclusively.

Where Pound-inch Is Used

  • Electrical terminals — breaker lugs and terminal blocks are specified in lbf·in, and both under- and overtightening cause failures.
  • Electronics and instrument assembly — small screws in enclosures and connectors.
  • Aerospace fasteners — small-diameter hardware throughout aircraft assembly.
  • Optics, firearms and precision equipment — mounting screws where excess torque distorts the assembly.

Torque screwdrivers and small click wrenches are graduated in lbf·in for exactly this range.

A Common and Expensive Mistake

Confusing lbf·in with lbf·ft applies twelve times the intended torque. On a 5 lbf·in electrical terminal this shears the screw or crushes the conductor. Always check which unit the specification uses before setting a wrench.

Converting Pound-inch

FromToMultiply by
lbf·inN·m0.112985
lbf·inlbf·ft0.0833333
lbf·inozf·in16