Kilogram-force Guide, Meaning , Facts, Information and Description
The unit kilogram-force is the force exerted by one kilogram of mass in standard Earth gravity (defined as exactly 9.806 65 m/s²). One kilogram-force is equal to exactly 9.806 65 newtons. The unit is abbreviated kgf.Since the 1960s, it has not been an official metric unit. The official SI unit of force is the newton.
External link
http://www1.bipm.org/en/si/si_brochure/chapter2/2-2/2-2-2.html
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