How many grams does 4 pennies weigh ? The answer to this question is <span>about </span>3.11 grams<span> each or about 145 copper pennies per pound. New zinc cents are much lighter and weigh only </span>2.5 grams<span> each yielding about 180 zinc pennies in a pound. And there are about 80 uncirculated quarters in a pound. </span>