Force converter
Kilogram-force and pound-force use standard gravity (9.806 65 m/s²) exactly.
1 pound-force = 4.4482 newtons
How it’s calculated
N = lbf × 4.448221615
- Multiply the value in pounds-force by 4.448221615.
- To go back, divide by 4.448221615 (or multiply by 0.2248089431).
- 1 lbf = 4.448221615 N · 1 N = 0.2248089431 lbf
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 lbf = 4.4482216152605 N. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).
Multiply by the factor written as a fraction
Put lbf in the denominator so it cancels, leaving N.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 4.4482 N
1 lbf in other units
Batch convert lbf → N
- 1 lbf = 4.4482 N
- 5 lbf = 22.241 N
- 10 lbf = 44.482 N
- 25 lbf = 111.21 N
Common force conversions
Force units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Newton (N) | SI (metric) | Base unit |
| Kilonewton (kN) | SI (metric) | 1 kN = 1000 N |
| Pound-force (lbf) | US & imperial (identical) | 1 lbf = 4.448221615 N |
| Kip (kilopound-force) (kip) | US & imperial (identical) | 1 kip = 4448.221615 N |
| Kilogram-force (kgf) | other | 1 kgf = 9.80665 N |
| Ounce-force (ozf) | US & imperial (identical) | 1 ozf = 0.278013851 N |
| Dyne (dyn) | other | 1 dyn = 0.00001 N |
Pounds-force to newtons conversion table
| Pounds-force (lbf) | Newtons (N) |
|---|---|
| 0.1 lbf | 0.44482 N |
| 0.5 lbf | 2.2241 N |
| 1 lbf | 4.4482 N |
| 2 lbf | 8.8964 N |
| 3 lbf | 13.345 N |
| 4 lbf | 17.793 N |
| 5 lbf | 22.241 N |
| 6 lbf | 26.689 N |
| 7 lbf | 31.138 N |
| 8 lbf | 35.586 N |
| 9 lbf | 40.034 N |
| 10 lbf | 44.482 N |
| 15 lbf | 66.723 N |
| 20 lbf | 88.964 N |
| 25 lbf | 111.21 N |
| 30 lbf | 133.45 N |
| 40 lbf | 177.93 N |
| 50 lbf | 222.41 N |
| 75 lbf | 333.62 N |
| 100 lbf | 444.82 N |
| 250 lbf | 1,112.1 N |
| 500 lbf | 2,224.1 N |
| 1,000 lbf | 4,448.2 N |
Frequently asked questions
Which force units can I convert?
newtons (N), kilonewtons (kN), pounds-force (lbf), kips (kip), kilograms-force (kgf), ounces-force (ozf), dynes (dyn).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.