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Convert lbs to newtons

Please provide values below to convert pound-force [lbf] to newton [N], or vice versa.



Definition: The pound-force (symbol: lbf) is a unit of force used in the English Engineering System and the British Gravitational System. It is defined as the gravitational force exerted on a mass of one avoirdupois pound under the condition of standard gravity (9.80665 m/s2). Under this definition, with mass in terms of slugs, one pound-force is equal to 1 slug·foot/second2.

History/origin: The pound-force is part of the foot-pound-second (FPS) system of units. Until 1901, when the General Conference of Weights and Measures adopted a standard acceleration due to gravity of 9.80665 m/s2, the pound-force was not precisely defined.

Current use: After the adoption of the International System of Units (SI), the newton, an SI derived unit of force, became the preferred unit of measurement of force. Although the pound-force may still be used in certain contexts, it is not a widely used unit of measurement.


Definition: The newton (symbol: N) is the SI (International System of Units) derived unit of force. It is defined as 1 kilogram·meter/second2.

History/origin: The unit newton is named after Isaac Newton for his contribution to classical mechanics – particularly his second law of motion, which states that the rate of change of momentum of a body is directly proportional to the applied force, and that this change in momentum occurs in the direction of the applied force.

Current use: As an SI derived unit of force, the newton is the preferred unit of force, and is widely used in scientific contexts, particularly in physics. In everyday use, units such as the pound-force are sometimes used in place of newtons in countries like the United States.

Pound-force to Newton Conversion Table

Pound-force [lbf]Newton [N]
0.01 lbf0.0444822162 N
0.1 lbf0.4448221615 N
1 lbf4.4482216153 N
2 lbf8.8964432305 N
3 lbf13.3446648458 N
5 lbf22.2411080763 N
10 lbf44.4822161525 N
20 lbf88.9644323051 N
50 lbf222.4110807627 N
100 lbf444.8221615255 N
1000 lbf4448.2216152548 N

How to Convert Pound-force to Newton

1 lbf = 4.4482216153 N
1 N = 0.2248089431 lbf

Example: convert 15 lbf to N:
15 lbf = 15 × 4.4482216153 N = 66.7233242288 N

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