There are 1000 grams in a KG, so to change grams to kilograms devide by 1000 and to change kilograms to grams multiply by 1000.

1 kilogram equals 1000 grams. So if you have 5000 grams you would have 5 kilograms. 5000/1000 = 5 or if you were given 5 kilograms and needed to know the number of grams....that would be 5 KG x 1000 = 5000 grams.

139g