How much does 900 pennies weigh?

The weight of 900 pennies can be calculated by first determining the weight of a single penny. A U.S. penny weighs approximately 2.5 grams. Therefore, 900 pennies would weigh 2.5 grams x 900, which equals 2250 grams. This is equivalent to 2.25 kilograms or approximately 4.96 pounds.