Pounds-force (lbf)
The pound-force is the weight of a one-pound mass under standard gravity, about 4.448 N.
Convert pounds-force to any force unit
1 pound-force = 4.448221615 newtons
Quick facts
1 pound-force in other units
| Newtons | 4.448221615 N |
| Kilograms-force | 0.45359237 kgf |
| Kilonewtons | 0.004448221615 kN |
| Dynes | 444,822.1615 dyn |
| Kips | 0.001 kip |
What is a pound-force?
The pound-force is the weight of a one-pound mass under standard gravity, about 4.448 N. It is the US customary unit of force, used for jet engine thrust, spring rates and structural loads.
Where the pound-force sits among force units
The pound-force is number 9 of 18 on our scale of force units, ordered from smallest to largest.
Pounds-force in real life
- A GE90 jet engine produces up to 115,000 lbf of thrust
- A newton is about 0.225 lbf
One pound-force is about the weight of 4.4 apples, or about 45% of the weight of a liter of water, or about the weight of 454 paperclips, or about 6.2% of the weight of a bowling ball.
Top pound-force conversions
Common amounts of pounds-force
- 0.1 lbf
- 0.2 lbf
- 0.3 lbf
- 0.4 lbf
- 0.5 lbf
- 0.6 lbf
- 0.7 lbf
- 0.8 lbf
- 0.9 lbf
- 1 lbf
- 1.5 lbf
- 2 lbf
- 2.5 lbf
- 3 lbf
- 3.5 lbf
- 4 lbf
- 4.5 lbf
- 5 lbf
- 6 lbf
- 7 lbf
- 7.5 lbf
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- 440 lbf
- 450 lbf
- 460 lbf
- 470 lbf
- 480 lbf
- 490 lbf
- 500 lbf
- 600 lbf
- 700 lbf
- 800 lbf
- 900 lbf
- 1,000 lbf
- 1,200 lbf
- 1,500 lbf
- 2,000 lbf
- 2,500 lbf
- 3,000 lbf
- 4,000 lbf
- 5,000 lbf
- 10,000 lbf
Convert pounds-force to all 17 other units
Metric (SI)
Gravitational
Scientific
Convert to pounds-force
Frequently asked questions
What is a pound-force?
The pound-force is the weight of a one-pound mass under standard gravity, about 4.448 N.
How is the pound-force defined?
The weight of one pound under standard gravity (about 4.448 N).
How many newtons are in a pound-force?
One pound-force equals 4.448221615 newtons.
How many kilograms-force are in a pound-force?
One pound-force equals 0.45359237 kilograms-force.
How many kilonewtons are in a pound-force?
One pound-force equals 0.004448221615 kilonewtons.