Pound-Force Foot to Newton Meter Conversion

Convert between Pound-Force Foot and Newton Meter quickly and accurately.

From Pound-Force Foot

lbf·ft

To Newton Meter

N·m

How to Convert Pound-Force Foot to Newton Meter

Conversion Formula

1 lbf·ft = 1.356 N·m

1 N·m = 0.738 lbf·ft

Example

Convert 15 lbf·ft to N·m:

15 lbf·ft = 15 × 1.356 N·m = 20.337 N·m

Unit Information

Learn about the torque units you're converting between

Pound-Force Foot

lbf·ft

Definition

The pound-force foot (lbf·ft) is an imperial unit of torque, commonly known as foot-pound. It represents the rotational force produced by one pound-force applied at one foot from the pivot point.

History/Origin

This unit is a cornerstone of the US customary system for rotational dynamics. It has a long history of use in mechanical engineering, particularly in the automotive, aerospace, and manufacturing industries.

Current Use

Predominantly used in the United States for engineering calculations, especially in contexts like engine torque, fastener tightening, and machinery design where imperial units for force and length are standard.

Multiplier

1.356

Offset

Newton Meter

N·m

Definition

The newton meter (N·m) is the SI unit of torque, representing the rotational force produced when a force of one newton is applied perpendicularly at a distance of one meter from the pivot point. It is the fundamental unit for measuring rotational force in the International System of Units.

History/Origin

The newton meter was established as part of the SI system in 1960, derived from the fundamental units of force (newton) and length (meter). It replaced various historical torque units and became the international standard for measuring rotational force in scientific and engineering applications worldwide.

Current Use

Widely used in mechanical engineering, automotive design, robotics, and physics to calculate torque in engines, motors, and other rotating machinery. It is essential for understanding rotational equilibrium, motion, and the design of mechanical systems.

Multiplier

Offset