Lbs to Newtons Converter
Created by: Daniel Hayes
Last updated:
To convert pounds to newtons, multiply by 4.44822. One pound-force (lbf) equals 4.448 N, so 10 lbs is 44.48 N, 100 lbs is 444.8 N and 1,000 lbs is 4,448 N. Going the other way, 1 newton is 0.2248 lbf. Use the converter below in either direction, or check the charts.
Lbs to Newtons Converter
Multiply pounds-force by 4.44822 to get newtons, or switch direction to convert newtons to pounds.
Lbs to newtons conversion chart
Newtons = pounds-force × 4.44822.
| Pounds (lbf) | Newtons (N) |
|---|---|
| 1 lbf | 4.448 |
| 2 lbf | 8.896 |
| 5 lbf | 22.241 |
| 10 lbf | 44.482 |
| 15 lbf | 66.723 |
| 20 lbf | 88.964 |
| 25 lbf | 111.21 |
| 30 lbf | 133.45 |
| 40 lbf | 177.93 |
| 50 lbf | 222.41 |
| 75 lbf | 333.62 |
| 100 lbf | 444.82 |
| 150 lbf | 667.23 |
| 200 lbf | 889.64 |
| 250 lbf | 1,112.06 |
| 300 lbf | 1,334.47 |
| 500 lbf | 2,224.11 |
| 750 lbf | 3,336.17 |
| 1,000 lbf | 4,448.22 |
| 2,000 lbf | 8,896.44 |
| 5,000 lbf | 22,241 |
| 10,000 lbf | 44,482 |
| 25,000 lbf | 111,206 |
| Newtons (N) | Pounds (lbf) |
|---|---|
| 1 N | 0.225 |
| 5 N | 1.124 |
| 10 N | 2.248 |
| 20 N | 4.496 |
| 50 N | 11.240 |
| 100 N | 22.5 |
| 200 N | 45.0 |
| 500 N | 112.4 |
| 1,000 N | 224.8 |
| 2,000 N | 449.6 |
| 5,000 N | 1,124.0 |
| 10,000 N | 2,248.1 |
| 50,000 N | 11,240.4 |
| 100,000 N | 22,480.9 |
How to convert pounds to newtons
N = lbf × 4.44822
lbf = N × 0.224809
The pound-force is defined as the weight of exactly 0.45359237 kg under standard gravity, 9.80665 m/s². Multiplying the two gives 4.4482216152605 newtons, so the factor is exact rather than measured.
Worked examples
- A 25 lbf spring force: 25 × 4.44822 = 111.21 N.
- A 180 lb person standing on a scale pushes down with 180 × 4.44822 = 800.7 N.
- A 25,000 lbf engine thrust rating: 25,000 × 4.44822 = 111,206 N, or 111.2 kN.
Frequently Asked Questions
How many newtons are in a pound?
One pound-force (lbf) is exactly 4.4482216152605 newtons, usually rounded to 4.448 N. It is the weight of a one-pound mass under standard gravity (9.80665 m/s²).
How do you convert lbs to newtons?
Multiply pounds by 4.448. For example, 20 lbs × 4.448 = 88.96 N and 100 lbs × 4.448 = 444.8 N. To go the other way, multiply newtons by 0.2248 (or divide by 4.448).
Is lbs the same as lbf?
Strictly, lb is a unit of mass and lbf is a unit of force. In everyday use, though, "lbs" usually means weight, and on Earth a 1 lb mass weighs 1 lbf. So converting a weight in lbs to newtons uses the same 4.448 factor. If you mean the mass, convert to kilograms instead (1 lb = 0.4536 kg).
How many newtons is 299 lb?
299 lbf × 4.44822 = 1,330.0 N, or about 1.33 kilonewtons.
How many pounds is 1,000 newtons?
1,000 N × 0.224809 = 224.8 lbf. One kilonewton is therefore a little under 225 pounds-force.
What is the difference between a newton and a kilogram-force?
A kilogram-force (kgf) is the weight of a one-kilogram mass under standard gravity, 9.80665 N. A newton is the force that accelerates one kilogram at one meter per second squared, so 1 kgf ≈ 9.81 N and 1 lbf ≈ 0.4536 kgf.
Sources and References
- NIST Special Publication 811, Guide for the Use of the International System of Units. Appendix B lists 1 lbf = 4.448 222 N.
- NIST: Unit conversion