How this force converter works
Force is a push or a pull — anything that can change the motion of an object. It shows up as the newtons on a physics problem, the pound-force on a spec sheet, and the kilogram-force on older engineering charts. They all measure the same quantity on different scales. To convert accurately between them, this tool turns whatever you type into a single base unit — the newton — and then expresses that base value in every other unit. Converting through a base avoids the rounding errors that creep in when you chain conversions one after another.
The exact factors used (each expressed in newtons) are: 1 kN = 1000 N, 1 lbf = 4.4482216153 N, 1 kgf = 9.80665 N, 1 dyne = 1×10⁻⁵ N, and 1 ozf = 0.278013851 N. The most-searched pairings — newtons to pound-force and newtons to kilogram-force — are highlighted at the top so you can read them at a glance.
Common conversions
| From | Equals |
|---|---|
| 1 pound-force (lbf) | 4.4482 newtons (N) |
| 1 newton (N) | 0.2248 pound-force (lbf) |
| 1 kilogram-force (kgf) | 9.80665 newtons (N) |
| 1 kilonewton (kN) | 1000 newtons (N) |
| 1 newton (N) | 100,000 dynes (dyn) |
| 1 ounce-force (ozf) | 0.2780 newtons (N) |
Reference note: pound-force (lbf) is a unit of force and should not be confused with pound-mass (lb), a unit of mass. Results are rounded for readability.
Frequently asked questions
- How do I convert newtons to pounds?
- To convert newtons (N) to pound-force (lbf), divide by 4.4482216153, or multiply by about 0.224809. For example, 100 N ÷ 4.448222 ≈ 22.48 lbf. This converter shows the result the instant you type a value.
- What is a newton?
- The newton (N) is the SI unit of force. One newton is the force needed to accelerate a one-kilogram mass at one metre per second squared (1 N = 1 kg·m/s²). It is the base unit this converter uses internally.
- What is pound-force vs pound-mass?
- Pound-force (lbf) is a unit of force — the weight of one pound-mass in standard Earth gravity — and equals 4.4482216153 newtons. Pound-mass (lb) is a unit of mass. They share the name "pound" but measure different quantities; this tool works in pound-force.
- How many N in a kgf?
- One kilogram-force (kgf) equals exactly 9.80665 newtons, because it is the force of standard gravity on a one-kilogram mass. So 1 kgf = 9.80665 N, and to convert kilogram-force to newtons you multiply by 9.80665.
- What is a dyne?
- The dyne is the CGS unit of force. One dyne is the force needed to accelerate one gram at one centimetre per second squared, and equals 1×10⁻⁵ newtons. So there are 100,000 dynes in one newton.
- How do I convert lbf to N?
- Multiply pound-force (lbf) by 4.4482216153 to get newtons. For example, 50 lbf × 4.448222 ≈ 222.41 N. To go the other way, divide newtons by 4.448222 (or multiply by about 0.224809).