A torque wrench spec says '50 lbf-ft.' How many N-m is that?

50 lbf-ft × 1.35582 ≈ 67.8 N-m. This combines force and distance; use the torque conversion factor (1.35582).

I weigh 150 lbs. How much force is that in newtons?

150 lb (mass) × 4.448 ≈ 667 N. However, the correct conversion is 150 lbs = 668 N (accounting for gravity). For kilogram-force comparisons, see [kilogram-force to newtons]({/force/kgf-to-newtons/}).

Is 1 lbf the same as 1 lb on a scale?

On Earth, yes—numerically. A scale reads mass (lb), but measures the downward force (lbf). 1 lb mass exerts ~1 lbf force. But they're different units.

What's the difference between force, weight, and mass?

Mass (kg or lb) is how much stuff something is. Weight = mass × gravity (N or lbf). Force is any push/pull. On Earth: 1 lb mass weighs ~1 lbf. See [newtons to pounds-force]({/force/newtons-to-lbf/}) for the reverse conversion.

Pounds-Force (lbf) to Newtons Converter

Enter a value to instantly convert between force units.

From

Precision4 dp

1 Pound-Force = 4.4482 Newton

Key Formulas

Newton → Pound-Force

lbf = N × 0.224809

Pound-Force → Newton

N = lbf × 4.44822

Kilogram-Force → Newton

N = kgf × 9.80665

Newton → Kilogram-Force

kgf = N × 0.101972

Formula

N = lbf × 4.44822

Pounds-force (lbf) is the imperial unit for force, still used in US engineering and mechanics. Newtons (N) are the SI standard. Converting between them is essential when reading US equipment manuals or comparing force specifications across markets.

Source: NIST SP 811, Table B.8

Frequently Asked Questions

Real-World Examples

Definition. 1 lbf = 4.448 N. The force exerted by a 1 lb mass at Earth's surface.

1 lbf = 4.448 N

Hammer blow. Striking a nail with moderate force (~50 lbf) exerts about 220 N.

50 lbf = 222.4 N

Industrial clamp. A C-clamp tightened to full strength exerts 200+ lbf (900+ N) of clamping force.

200 lbf = 889.6 N

Light lifting. Lifting a 10 lb object requires about 44.5 N of force.

10 lbf = 44.48 N

newtons to lbf kgf to newtons newtons to kgf kn to newtons newtons to kn

Pounds-Force (lbf) to Newtons Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

Related Converters