Force and Torque
lbftoN
Convert pounds-force (lbf) to newtons (N).
Factor1 lbf = 4.448222 N
Converter
lbf
Accepts numbers or expressions, e.g. 150 + 14.7
Result
N
Rendered to 6 significant figures.
Formula
Formula
N = lbf × 4.448222
Multiply any value in pounds-force by 4.448222 to obtain the value in newtons.
Worked example
Convert 100 lbf to N.
- 01Start with 100 lbf.
- 02Multiply by the conversion factor: 100 × 4.448222 = 444.822 N.
Result100 lbf = 444.822 N
Conversion table
| lbf | N |
|---|---|
| 1 | 4.4482 |
| 2 | 8.8964 |
| 5 | 22.241 |
| 10 | 44.482 |
| 20 | 88.964 |
| 50 | 222.41 |
| 100 | 444.82 |
| 200 | 889.64 |
| 500 | 2224.1 |
| 1000 | 4448.2 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from lbf to N?
1 lbf equals 4.448222 N. To convert, multiply the value in pounds-force by 4.448222.
How do I convert 1 lbf to N?
1 lbf = 4.44822 N. For any value, multiply by 4.448222.
How do I convert N back to lbf?
Divide by the same factor — or equivalently, multiply by 0.2248089. So 1 N = 0.224809 lbf.
When would I need to convert pound-force to newton?
Force conversions between lbf and N are needed in structural analysis, mechanical equipment design, lifting and rigging calculations, and load specification. Newtons and kilonewtons are standard in SI-based structural codes; pound-force and kips are common in US codes and vendor datasheets.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).