How thick is us currency?

U.S. currency, including both paper bills and coins, varies in thickness. For example, paper bills have a uniform thickness of about 0.0043 inches (0.11 mm), while coins vary: a quarter is approximately 1.95 mm thick, and a penny is about 1.52 mm thick. The thickness of the bills is consistent across all denominations, while coins differ based on their specific design and composition.