How much spiral ham for 150 people?

For 150 people, you should plan on serving about 1/3 to 1/2 pound of spiral ham per person. This means you'll need approximately 50 to 75 pounds of spiral ham in total. It's best to err on the side of more if you're unsure, as leftovers can be enjoyed later. Additionally, consider the presence of other dishes when finalizing the amount.