8-10 heads of lettuce depending on how much lettuce you use
You don't mention whether this is for salad or for sandwiches. For side salads, you would need 12 to 14 medium size heads of lettuce for 100 people.
if that is the only thing they are eating figure 12-16oz, if that is only as an appetizer figure 6-8 oz. So 150 pounds for an entree and 75-100 pounds for an appetizer
If it's only a starter salad, I would use about 15 pounds romaine with 5 pounds other green veg.
Ten
100
6.17 lbs of shredded lettuce is in 100 cups.
Lettuce can be added to meal to enhance flavor and health. One hundred grams of shredded lettuce is equivalent to 1 and 1/3 of a cup.
11 calories per 100 grams.
100, and they also have 50 heads
4 per 100
there is 0.94 grams of sugar per 100 grams of lettuce