Pound-force (lbf)
Force of standard gravity on one avoirdupois pound: exactly 4.4482216152605 newtons.
What is a pound-force?
- Symbol
- lbf
- Quantity
- Force
- Unit system
- US customary
- Definition
- Force of standard gravity on one avoirdupois pound: exactly 4.4482216152605 newtons.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used in US engineering for loads, thrust and spring forces. Not to be confused with the pound, which is mass.
Pound-force in other force units
- 1 lbf = 4448.2216152605 mNMillinewton
- 1 lbf = 4.4482216152605 NPound-force to Newton converter
- 1 lbf = 0.0044482216152605 kNPound-force to Kilonewton converter
- 1 lbf = 0.0000044482216152605 MNMeganewton
- 1 lbf = 444822.16152605 dynDyne
- 1 lbf = 453.59237 gfGram-force
- 1 lbf = 0.45359237 kgfPound-force to Kilogram-force converter
- 1 lbf = 0.00045359237 tfTonne-force (metric)
- 1 lbf = 16 ozfOunce-force
- 1 lbf = 0.001 kipKip-force
- 1 lbf = 0.0005 tonf (US)Short ton-force (US)
- 1 lbf ≈ 0.0004464285714 tonf (UK)Long ton-force (UK)
- 1 lbf ≈ 32.17404856 pdlPoundal
Pound-force quick reference
| Pound-force | Newton | Kilonewton | Kilogram-force |
|---|---|---|---|
| 1 lbf | = 4.4482216152605 N | = 0.0044482216152605 kN | = 0.45359237 kgf |
| 10 lbf | = 44.482216152605 N | = 0.044482216152605 kN | = 4.5359237 kgf |
| 100 lbf | = 444.82216152605 N | = 0.44482216152605 kN | = 45.359237 kgf |
| 1000 lbf | = 4448.2216152605 N | = 4.4482216152605 kN | = 453.59237 kgf |
Where the pound-force fits
The next smaller force unit is the newton (N). 1 lbf = 4.4482216152605 N, and 1 N ≈ 0.2248089431 lbf.
The next larger force unit is the kilogram-force (kgf). 1 lbf = 0.45359237 kgf, and 1 kgf ≈ 2.204622622 lbf.
Frequently asked questions
- How many newtons are in one pound-force?
- One pound-force = 4.4482216152605 N (newtons).
- How many kilonewtons are in one pound-force?
- One pound-force = 0.0044482216152605 kN (kilonewtons).
- How many kilograms-force are in one pound-force?
- One pound-force = 0.45359237 kgf (kilograms-force).