Unit Conversion

Force Converter

Convert N, kN, mN, lbf, kgf, dyn and poundals accurately. Calculate net force from mass and acceleration, and weight under different gravity.

Converted force

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All equivalent values

Formula and calculation

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Kilograms and pounds here are units of mass; newtons, lbf and kgf are units of force. Kilopond (kp) is another name for kilogram-force (kgf).

Try a useful example

Force from mass and acceleration

Net force from F = m × a—
Weight force from W = m × g—

Force versus acceleration

Force direction

m10 N

Earth uses standard gravity for unit definitions. Moon and Mars presets are approximate local surface values; actual gravity varies by location.

Formula and calculation

Net force = mass × acceleration. Weight force = mass × gravity. A negative acceleration gives a signed net force in the opposite direction; the weight result remains positive.

1 kgf = 1 kp = 9.80665 N · 1 lbf = 4.4482216152605 N · 1 pdl = 0.138254954376 N

NIST · NASA

Newtons to pounds-force

Newtons are the SI force unit, while pounds-force are common in US engineering and tool specifications.

  • 1 N = 0.224809 lbf.
  • 1 lbf = 4.44822 N.
  • 1 kN = 1,000 N.

kgf, dynes, and other force units

Older references and specialized fields may use kilogram-force, dynes, poundals, or kiloponds.

  • 1 kgf = 9.80665 N.
  • 1 dyne = 0.00001 N.
  • Check whether a source means mass or force.

Force in formulas

Convert force units before using formulas for pressure, torque, work, or acceleration.

  • Newton’s second law: F = m x a.
  • Pressure = force / area.
  • Torque = force x lever arm distance.

Force Converter FAQ

How do I convert newtons to pounds-force?

Multiply newtons by 0.224809 to get pounds-force.

How do I convert lbf to newtons?

Multiply pounds-force by 4.44822 to get newtons.

What is kilogram-force?

Kilogram-force is the force exerted by one kilogram of mass under standard gravity, equal to 9.80665 N.

Is pound-force the same as pound mass?

No. Pound-force is force, while pound mass is mass.

What is force used for?

Force is used in mechanics, pressure, torque, acceleration, structural calculations, and engineering.

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