The unit kilogramforce (kgf) or kilopond (kp) is defined as the magnitude of the force exerted on one kilogram of mass by a 9.80665 m/s^{2} gravitational field (standard gravity, a conventional value approximating the average magnitude of gravity on Earth). So one kilogramforce is by definition equal to 9.80665 newtons.^{[1]}^{[2]} Similarly a gramforce is 9.80665 millinewtons (or 0.00980665 newtons), and a milligramforce is 9.80665 micronewtons (or 9.80665×10^{ −6} newtons).
The kilogramforce has never been a part of the International System of Units (SI), which was introduced in 1960. The SI unit of force is the newton.
Prior to this, the unit was widely used in much of the world; it is still in use for some purposes. The thrust of a rocket engine, for example, was measured in kilogramsforce in 1940s Germany, in the Soviet Union (where it remained the primary unit for thrust in the Russian space program until at least the late 1980s), and it is still used today in China and sometimes by the European Space Agency.
It is also used for tension of bicycle spokes, for torque measured in "meterkilograms", for pressure in kilograms per square centimeter, for the draw weight of bows in archery, and to define the "metric horsepower" (PS) as 75 metrekiloponds per second.^{[1]}
The gramforce and kilogramforce were never welldefined units until the CGPM adopted a standard acceleration of gravity of 980.665 cm/s^{2} for this purpose in 1901, though they had been used in lowprecision measurements of force before that time.
A tonneforce, metric tonforce, megagramforce, or megapond (Mp) is 1000 kilogramsforce.
The decanewton or dekanewton (daN) is used in some fields as an approximation to the kilogramforce, being exactly rather than approximately 10 newtons.
newton (SI unit) 
dyne  kilogramforce, kilopond 
poundforce  poundal  

1 N  ≡ 1 kg·m/s²  = 10^{5} dyn  ≈ 0.10197 kp  ≈ 0.22481 lb_{f}  ≈ 7.2330 pdl 
1 dyn  = 10^{−5} N  ≡ 1 g·cm/s²  ≈ 1.0197×10^{−6} kp  ≈ 2.2481×10^{−6} lb_{f}  ≈ 7.2330×10^{−5} pdl 
1 kp  = 9.80665 N  = 980665 dyn  ≡ g_{n}·(1 kg)  ≈ 2.2046 lb_{f}  ≈ 70.932 pdl 
1 lb_{f}  ≈ 4.448222 N  ≈ 444822 dyn  ≈ 0.45359 kp  ≡ g_{n}·(1 lb)  ≈ 32.174 pdl 
1 pdl  ≈ 0.138255 N  ≈ 13825 dyn  ≈ 0.014098 kp  ≈ 0.031081 lb_{f}  ≡ 1 lb·ft/s² 
The value of g_{n} as used in the official definition of the kilogramforce is used here for all gravitational units. 
System  Gravitational  Engineering  Absolute  

Force (F)  F = m·a  F = m·a/g_{c} = w·a/g  F = m·a  
Weight (w)  w = m·g  w = m·g/g_{c} ≈ m  w = m·g  
Units  English  Metric  English  Metric  English  Metric 
Acceleration (a)  ft/s^{2}  m/s^{2}  ft/s^{2}  m/s^{2}  ft/s^{2}  m/s^{2} 
Mass (m)  slug  hyl  poundmass  kilogram  pound  kilogram 
Force (F)  pound  kilopond  poundforce  kilopond  poundal  newton 
