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Force Converter

Popular Force unit conversions

Force Converter — Convert Newtons, Pound-force, Kilogram-force & More

Our free online Force Converter lets you instantly convert between 32+ units of force — from SI units like newtons and kilonewtons to imperial units like pound-force and poundal, plus dyne, kilogram-force, and more. Whether you need to convert newtons to pound-force, kilonewtons to kilogram-force, dyne to newton, or ton-force to kilonewton, this tool delivers instant and accurate results.

Force is a vector quantity that causes a change in motion of an object. It is defined as mass times acceleration (F = ma) and is used throughout physics, engineering, and mechanics. Common unit systems include:

  • SI metric: newton (N), kilonewton (kN), meganewton (MN), millinewton (mN), micronewton (µN)
  • CGS: dyne (dyn) — 1 dyne = 10⁻⁵ N
  • Gravitational metric: kilogram-force (kgf), gram-force (gf), ton-force (metric)
  • Imperial / US: pound-force (lbf), ounce-force (ozf), ton-force (short/long), kip-force (kipf)
  • Absolute: poundal (pdl) — the force that accelerates 1 lb mass at 1 ft/s²

All conversions use internationally standardized SI factors, making this tool reliable for mechanical engineering, structural analysis, physics, aerospace, and everyday force calculations.

Common Force Conversion Reference

Here are the most frequently used force conversions for quick reference:

  • 1 newton = 0.224809 pound-force = 0.101972 kilogram-force = 100,000 dynes
  • 1 pound-force (lbf) = 4.44822 newtons = 0.453592 kilogram-force
  • 1 kilogram-force (kgf) = 9.80665 newtons = 2.20462 pound-force
  • 1 kilonewton (kN) = 1,000 newtons = 224.809 pound-force = 101.972 kgf
  • 1 dyne = 10⁻⁵ newtons = 1.02 × 10⁻⁶ kilogram-force
  • 1 ton-force (metric) = 9,806.65 newtons = 2,204.62 pound-force
  • 1 kip-force = 4,448.22 newtons = 1,000 pound-force
  • 1 poundal = 0.138255 newtons = 0.031081 pound-force

Frequently Asked Questions — Force Converter

Question: How do I use the Force Converter?

Answer: Select the unit you are converting from in the left list and the unit to convert to in the right list, then type your value. The result appears instantly across all listed units.

Question: What is a newton?

Answer: The newton (N) is the SI unit of force, defined as the force needed to accelerate a 1-kilogram mass at 1 meter per second squared (N = kg·m/s²). It is named after Sir Isaac Newton. Standard gravity at Earth's surface is approximately 9.80665 N per kilogram of mass.

Question: What is the difference between a newton and a kilogram-force?

Answer: A kilogram-force (kgf) is the gravitational force on a 1-kilogram mass at standard Earth gravity. 1 kgf = 9.80665 N. The newton is the SI unit of force (mass × acceleration), while kilogram-force mixes mass and gravity — it is a non-SI unit used in some engineering contexts.

Question: How do I convert newtons to pound-force?

Answer: Multiply the newtons by 0.224809 to get pound-force (lbf). For example, 100 N × 0.224809 = 22.48 lbf. Conversely, 1 lbf = 4.44822 N.

Question: What is a dyne?

Answer: The dyne is the CGS (centimeter-gram-second) unit of force. One dyne equals 10⁻⁵ newtons or 0.0000102 kilogram-force. One newton equals 100,000 dynes. The dyne is used in some older scientific literature.

Question: What is a kip-force?

Answer: A kip-force (or simply kip) equals 1,000 pound-force (lbf) or approximately 4,448.22 newtons. The word "kip" is a portmanteau of "kilo-pound." It is used in structural and civil engineering in the US for large forces.

Question: What is the difference between force and weight?

Answer: Weight is the gravitational force acting on an object's mass: W = m × g, where g ≈ 9.80665 m/s². Force is the more general term covering any push or pull. Weight is measured in newtons (SI) or pound-force (US), while mass is measured in kilograms or pounds-mass.

Question: What is a poundal?

Answer: The poundal (pdl) is the absolute unit of force in the foot-pound-second (FPS) system. It is defined as the force that accelerates a mass of one pound at one foot per second squared. 1 poundal = 0.138255 newtons ≈ 0.031 pound-force.

Question: How accurate are the force conversions in this tool?

Answer: All conversions use internationally standardized conversion factors with up to 12 significant digits of precision, suitable for mechanical engineering, physics, structural analysis, and scientific research.