Stacks of 100 pennies are equal to $1 each. As of 2014, the penny is the lowest denomination of American coin in circulation. A penny has a monetary value of one cent, or one one-hundredth of a dollar.
Since 1983, pennies have been made of 2.5 percent copper and 97.5 percent plated zinc. Each coin weighs 2.5 grams and is 19.05 millimeters in diameter, with a thickness of 1.52 millimeters. Since 1909, the face of the coin has been minted with a likeness of Abraham Lincoln. The first pennies were minted in pure copper by the U.S. Mint in 1792. In 2013, over 7 billion pennies were minted for circulation.