Knowra Kilogram-force Kilogram-force The kilogram-force is a unit of force equal to the weight of one kilogram under standard gravity, exactly 9.80665 newtons. It is distinct from the kilogram, which measures mass.
Newton (unit) : The SI unit of force, equal to the force that gives one kilogram an acceleration of one metre per second squared. It is the SI alternative to kilogram-force, with a fixed conversion of 9.80665 newtons per kilogram-force.
Gravitational metric system : A system of units that uses gravitational force units, such as kilogram-force, as base or practical units. Kilogram-force became a central force unit in this non-coherent metric system.
Force gauge : An instrument that measures force, often by sensing deformation in a spring or load cell. Some force gauges display readings in kilogram-force alongside SI units.
Coherent system of units : A system in which derived units follow directly from base units without numerical conversion factors. Kilogram-force is non-coherent with the SI metre, kilogram, and second because its magnitude includes standard gravity.
Kilogram : The SI base unit of mass, defined by fixing the numerical value of the Planck constant. One kilogram of mass is the amount used to define one kilogram-force under standard gravity.
Metric system : A decimal system of measurement developed in France and now underlying the International System of Units. Kilogram-force emerged within metric engineering practice before SI standardized force in newtons.
Tensile strength : The maximum tensile stress a material can withstand before breaking. Older material specifications may state tensile loads or strengths using kilogram-force units.
Mass–weight distinction : The distinction between mass, an intrinsic measure of inertia, and weight, a gravitational force. The name kilogram-force can blur mass and force despite measuring force.
Standard gravity : The conventional acceleration due to gravity, defined as exactly 9.80665 metres per second squared. Its exact value determines the kilogram-force’s conversion to newtons.
Engineering units : Units and conventions chosen to make calculations and measurements convenient in engineering practice. Kilogram-force was widely used in engineering calculations involving loads and stresses.
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