Third-pound burger

A third-pound burger is a hamburger containing a patty that weighs one-third of a pound (approximately 5.3 ounces or 150 grams) before cooking. It is larger than a quarter-pound burger (4 ounces or 113 grams), which is commonly offered by fast-food chains. The third-pound burger became widely known in the 1980s following a marketing campaign by A&W Restaurants in the United States. The campaign, which sought to compete with McDonald's Quarter Pounder, was unsuccessful because consumers misunderstood fractions, making it a case study in consumer behavior and marketing communication.