Another answer which I found - a number very close to that one says -
453.59237 grams per pound.
I wonder why?
Grams are a metric mesurement. Pound is an outdated imperial mesurement. Due to this there is no direct relationship between the two measurements. 1 pound = 453.59237g though for most purposes this is rounded to 453.6g per pound.
Algebraic steps:
1 lb | * | 1 kg 2.2046226218 lb | * | 1000 g 1 kg | = | 453.59237 g |