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Pounds to Newtons Converter

Convert pounds-force (lbf) to newtons (N) and back.

What this tool does

Convert pounds-force (lbf) to newtons (N) and back. Type an amount in pounds-force, choose the units, and the tool converts it to newtons. It converts between these two force units, in either direction.

Inputs

  • Value: A number.
  • From: Choose one: Newton, Pound-force. Starts as Pound-force.
  • To: Choose one of the same 2 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. 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 pounds-force to newtons and back. For other force units, see the Pound-Force Converters page.
  • The pound here is the pound-force, defined with standard gravity of 9.80665 m/s2. It is a force, not a mass.

FAQs

Q: How do I convert pounds-force to newtons?
A: Multiply by 4.4482216152605. One pound-force is about 4.448 newtons.
Q: How do I convert newtons to pounds-force?
A: Divide by 4.4482216152605, or multiply by about 0.2248. Choose newton in the From box and pound-force in the To box.
Q: Does this convert pounds of weight or mass?
A: It treats the pound as a pound-force, which is the weight of a one-pound mass under standard gravity. So a mass of 1 lb weighs 1 lbf, or about 4.448 N, under standard gravity.

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