Force Conversion Calculator
Convert between newtons, pound-force, kilogram-force, dynes, and more with this free online force converter. Supports 13 force units for physics and engineering.
About This Calculator
The Force Conversion Calculator is a free online tool for converting between 13 different force units including newtons (N), kilonewtons (kN), pound-force (lbf), kilogram-force (kgf), dynes (dyn), kips (kip), poundals (pdl), meganewtons (MN), giganewtons (GN), teranewtons (TN), millinewtons (mN), micronewtons (µN), and sthenes (sn). Whether you are a physics student working on Newton's second law problems, an engineer designing structures, or a professional needing quick unit conversions, this tool delivers accurate results instantly.
The conversion formulas used are based on the SI definition where 1 newton (N) = 1 kg·m/s². All other units are derived relative to the newton: pound-force is converted using 1 lbf = 4.4482216153 N, kilogram-force uses 1 kgf = 9.80665 N, and the dyne (from the CGS system) uses 1 dyne = 0.00001 N. The kip, commonly used in US engineering, equals 1000 lbf or approximately 4448.22 N. The poundal, from the FPS system, is defined as 1 lb·ft/s² = 0.1382549544 N.
Regional Notes
India (IN): The SI newton is the standard unit taught in Indian schools and used in engineering. Kilogram-force (kgf) is sometimes used in practical contexts.
United States (US): Pound-force (lbf) and kips (kip) are widely used in US engineering and construction. Newtons are used in scientific contexts.
United Kingdom (UK): The newton is the standard SI unit. Pound-force and poundals appear in legacy engineering documents and some educational contexts.
Frequently Asked Questions
How does the Force Conversion Calculator work?
Enter a force value, select the unit you are converting from, and choose the target unit. The calculator instantly converts using standard formulas: 1 N = 1 kg·m/s², 1 lbf = 4.44822 N, 1 kgf = 9.80665 N, 1 dyne = 0.00001 N. A comparison table shows the value in all supported force units.
What force units are supported?
The calculator supports 13 force units: Newton (N), Kilonewton (kN), Meganewton (MN), Giganewton (GN), Teranewton (TN), Millinewton (mN), Micronewton (µN), Pound-force (lbf), Kip (kip), Poundal (pdl), Kilogram-force (kgf), Dyne (dyn), and Sthene (sn).
How do you convert newtons to pound-force?
To convert newtons (N) to pound-force (lbf), divide the newton value by 4.4482216153. For example, 100 N ÷ 4.44822 ≈ 22.48 lbf. Conversely, multiply pound-force by 4.44822 to get newtons.
Is this force converter free to use?
Yes, all calculators on Calculy including the Force Conversion Calculator are completely free to use with no limitations, registration, or hidden fees.
What is a newton in SI base units?
One newton (N) is the force required to accelerate a mass of one kilogram at a rate of one meter per second squared. In SI base units: 1 N = 1 kg·m/s². It is named after Sir Isaac Newton and is the standard SI unit for force.
How is the force converter useful for students?
Students studying physics and engineering can use the converter to quickly translate between SI units (newtons, kilonewtons) and imperial units (pound-force, poundals, kips) for homework, lab reports, and exam preparation. The comparison table helps understand relative magnitudes of different force units.
What is the difference between pound-force and poundal?
Pound-force (lbf) is the force exerted by gravity on one pound-mass on Earth, equal to about 4.44822 N. Poundal (pdl) is the force needed to accelerate one pound-mass at one foot per second squared, equal to about 0.138255 N. One lbf ≈ 32.174 pdl.