⚖️ Pounds-force to Newtons Converter
Translate force measurements from the imperial system to SI units.
Enter the force in pounds-force to see the equivalent newtons, kilonewtons, kilogram-force, and dynes—ideal for structural analysis, actuator sizing, and physics problems.
Pounds-force represents the force exerted by one pound mass under standard gravity.
Newtons (N)
444.8222
Kilonewtons (kN)
0.444822
Kilogram-force (kgf)
45.359237
Dynes (dyn)
44,482,216
How to Use This Calculator
Enter pounds-force
Provide the force magnitude in lbf as listed on US-based datasheets or mechanical specs.
Review SI output
The converter returns newtons (N) as the primary SI force unit.
Use alternate units as needed
Kilonewtons, kilogram-force, and dynes assist when communicating with diverse engineering teams.
Formula
N = lbf × 4.4482216152605
Derived from the international pound and standard gravity (9.80665 m/s²). The same constant underpins all derived unit conversions shown.
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Pounds-force (lbf) remain prevalent across US engineering, automotive, and aerospace projects. When sharing data internationally or integrating with SI-based software, those values must be converted to newtons. This calculator handles the conversion instantly while offering helpful secondary units.
The additional outputs (kN, kgf, dyn) let you check manual calculations, update mixed-unit documentation, or answer questions from multinational teams without repeating work.
Use it alongside the Force Converter or Newton Meter Calculator to keep related force and torque calculations consistent throughout your project.
Frequently Asked Questions
What is the relationship between lbf and N?
1 lbf is defined as 4.4482216152605 newtons. This comes from the conversion between pounds, kilograms, and standard gravity.
Is pound-force different from pound-mass?
Yes. Pound-force measures force (weight), whereas pound-mass measures mass. The calculator deals with pound-force.
Can I convert negative forces?
Negative inputs represent direction (e.g., tension vs compression). The converter preserves the sign across all outputs.
How accurate is the conversion?
The tool uses internationally recognised constants, providing precision suitable for engineering and scientific use.