12 - The shekel A shekel weighed about 2/5 ounce or about 12 grams. is to consist of twenty gerahs. Twenty shekels plus twenty-five shekels plus fifteen shekels equal one mina. That is, 60 shekels; the common mina was 50 shekels. Sixty shekels were about 1 1/2 pounds or about 690 grams.