Note that the symbol kp usually stands for a different unit of force, the kilopond or kilogram-force.

The non-SI kilogram-force is also a unit of force typically used in the measure of weight.

In some older publications, kilogram-force per square centimeter is abbreviated ksc instead of kg/cm.

A technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter.

The decanewton is also encountered occasionally, probably because it is an SI approximation of the kilogram-force.

The decanewton or dekanewton (daN) is used in some fields as an approximation to the kilogram-force, being exactly rather than approximately 10 newtons.

The kilogram-force has never been a part of the International System of Units (SI), which was introduced in 1960.

But using the names kilogram, gram, kilogram-force, or gram-force (or their symbols) as units of force is expressly forbidden in SI.

The kilogram-force (kgf or kg), or kilopond (kp, from Latin pondus meaning weight), is a gravitational metric unit of force.

Although both the avoirdupois (or international pound and the kilogram are units of mass and have related unit of force the pound-force, the kilogram-force is seldom used.

The kilogram-force is a non-SI unit of force, defined as the force exerted by a one kilogram mass in standard Earth gravity (equal to 9.80665 newtons exactly).

The pound-force has a metric counterpart, less commonly used than the newton: the kilogram-force (kgf) (sometimes kilopond), is the force exerted by standard gravity on one kilogram of mass.

A kilogram-force per square centimeter (kgf/cm), often just kilogram per square centimeter (kg/cm), or kilopond per square centimeter is a unit of pressure using metric units.

The kilogram-force leads to an alternate, but rarely used unit of mass: the metric slug (sometimes mug or hyl) is that mass which accelerates at 1 m s when subjected to a force of 1 kgf.

Gravitational metric systems use the kilogram-force (kilopond) as a base unit of force, with mass measured in a unit known as the hyl, Technische Mass Einheit (TME), mug or metric slug.

The gram-force and kilogram-force were never well-defined units until the CGPM adopted a standard acceleration of gravity of 980.665 cm/s for this purpose in 1901, though they had been used in low-precision measurements of force before that time.

The kilogram-force is not a part of the modern SI system, and is generally deprecated; however it still sees use for some purposes as expressing jet thrust, bicycle spoke tension, torque wrench settings and engine output torque.

To calculate Vickers hardness number using SI units one needs to convert the force applied from kilogram-force to newtons by multiplying by 9.806 65 (standard gravity) and convert mm to m. To do the calculation directly, the following equation can be used: