Pound to Newton Converter
Convert pound-force (lbf) to Newtons (N) and back using the exact NIST conversion factor.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
1 Pound-force (lbf) = 4.448222 Newton (N)
N = lbf × 4.44822
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Pound to Newton Converter
The pound to newton converter changes pound-force into newtons with the exact NIST factor 1 lbf = 4.4482216 N. Pound-force is used in US engineering and aerospace, while the newton is the SI unit used in science and most of the world. The converter works both ways.
How to use it
- 1Enter the amount in pound-force.
- 2The equivalent in newtons appears instantly.
- 3Press the ⇌ button to convert from newtons back to pound-force.
- 4Choose how many decimal places to show if you need more or less precision.
Worked example
100 lbf × 4.448 = 444.8 N, and 1,000 N ÷ 4.448 ≈ 224.8 lbf.
How it works
Formula
N = lbf × 4.4482216152605
lbf = N ÷ 4.4482216152605
Conversion table
| lbf | N |
|---|---|
| 1 | 4.448 |
| 5 | 22.24 |
| 10 | 44.48 |
| 50 | 222.4 |
| 100 | 444.8 |
| 500 | 2224 |
| 1000 | 4448 |
Common use cases
- Physics homework
- Converting thrust and load ratings
- Reading US engineering data
Frequently asked questions
A:Pound-mass (lbm) measures mass; pound-force (lbf) measures force. At standard gravity, 1 lbm exerts 1 lbf. They are numerically equal on Earth but physically different quantities.
A:1 kgf = 9.80665 N. A kilogram-force is the force exerted by 1 kg of mass at standard gravity.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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