How do you turn kilograms into newtons?

Near the surface of the earth where the acceleration of gravity, g. can be taken as

9.8 m/s2, Newton's Second Law states the force on an object whose mass, m, is given in kilograms is

F=mg; units are kgXm/s2 which is equivalent to Newtons

basically multiply kg by 9.8 (9.8 being the value of gravity)