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Pound-Force Converters

Convert pounds-force (lbf) to newtons, kilonewtons, ounces-force, kilograms-force, dynes and other force units.

What this tool does

Convert pounds-force (lbf) to newtons, kilonewtons, ounces-force, kilograms-force, dynes and other force units. Type an amount in pounds-force, choose the units, and the tool converts it to newtons. It offers 14 force units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 14 options, including Micronewton, Millinewton, Newton, Kilonewton, Meganewton, Dyne. Starts as Pound-force.
  • To: Choose one of the same 14 units as "From". Starts as Newton.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from pounds-force to newtons:

  • 1 lbf ≈ 4.448222 N
  • 5 lbf ≈ 22.241108 N
  • 10 lbf ≈ 44.482216 N
  • 50 lbf ≈ 222.411081 N
  • 100 lbf ≈ 444.822162 N

Multiply the number of pounds-force by about 4.448222 to get newtons. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Pound-force: exact by definition. Newton: SI Brochure, 9th edition (2019).

Limitations

  • Converts a force from one unit to another. It does not work out force from mass and acceleration.
  • Kilogram-force, gram-force, pound-force and ounce-force are gravitational units, defined with standard gravity of 9.80665 m/s2. They measure a force, not a mass.

FAQs

Q: How many newtons is one pound-force?
A: One pound-force is exactly 4.4482216152605 newtons. It is the weight of one avoirdupois pound under standard gravity of 9.80665 m/s2.
Q: What is the difference between pound-force and poundal?
A: A poundal is the force that gives one pound of mass an acceleration of one foot per second squared, about 0.1383 newton. A pound-force is about 32.17 times larger.
Q: Is a pound-force the same as a pound?
A: No. A pound is a unit of mass. A pound-force is the force that one pound of mass exerts under standard gravity.

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