If you are handing out charity to the poor, why do you care about how much it weighs? You may give or hand out as much as you can afford. You may give as much clothes or food as one can carry. Why are you measuring it in grams or whatnot? It is not befitting of the morals of Islam for one to weigh the goods to be handed out. One should hand them out by handfuls, in abundance. - Harun Yahya