Pounds-force to Kilograms-force Converter

To convert a measurement in pounds-force to kilograms-force, multiply the value by 0.45359237. The conversion factor comes from the relationship between both units and the newton.

For example, to convert 5 lbf to kilograms-force: 5 × 0.45359237 = 2.267962 kgf.

A pound-force is the force exerted by gravity on a mass of one avoirdupois pound under standard gravity, equal to exactly 4.4482216152605 newtons. The pound-force comes from the imperial and US customary systems, where the pound has historically served as both a unit of mass and of force. It remains standard in US engineering practice.

Common uses of pounds-force include: US mechanical and aerospace engineering; Torque and fastener tension specifications; Rocket and jet engine thrust ratings; Load ratings for hardware and fasteners.

A kilogram-force is the force exerted by gravity on a mass of one kilogram under standard gravity, equal to exactly 9.80665 newtons. The kilogram-force (also called the kilopond) was common in older metric engineering before the SI newton became standard. It is still encountered in tire pressure, thrust, and legacy technical documents.

Common uses of kilograms-force include: Legacy metric engineering documentation; Thrust ratings expressed in kgf (aviation); Spring and load-cell calibration; Everyday 'weight as force' descriptions.

Here are some common values converted:

1 lbf = 0.45359237 kgf 5 lbf = 2.267962 kgf 10 lbf = 4.535924 kgf 50 lbf = 22.679618 kgf 100 lbf = 45.359237 kgf