Grams & Grains: 1 gram = 15 grains

First, calculate grams to grains by multiplying the number of grams by 15.

Second, calculate grains to grams by dividing the number of grains by 15.

Example: Convert 3 grams to grains: 3 X 15 = 45 gr
Convert 45 grains to grams: 45 / 15 = 3 g