How much hamburger meat to buy for 12 people?

For 12 people, it's generally recommended to plan for about 1/3 to 1/2 pound of hamburger meat per person, depending on how hearty the meal will be and whether other dishes are being served. This means you would need approximately 4 to 6 pounds of ground beef. If you're making burgers or a main dish featuring the hamburger meat, leaning towards the higher end is a good idea. Always consider your guests' appetites and any additional sides you might serve.