Quick, free, online unit converter that converts common units of measurement, along with 77 other converters covering an assortment of units. The site also includes a predictive tool that suggests possible conversions based on input, allowing for easier navigation while learning more about various unit systems. Sub-units of a dollar: 100 pennies = $1, 1 nickel = 5 pennies = 1/20 dollar, 1 dime = 10 pennies or 2 nickels = 1/10 dollar, 1 quarter = 25 pennies or 5 nickels, 1 quarter = $0.25 = 1/4 dollar, 1 dime = $0.10 = 1/10 dollar, 1 penny = $0.01 = 1/100 dollar, 1 nickel = $0.05 = 1/20 dollar.