Here are basic guidelines for individual serving sizes of various foods. Multiply these estimates by your number of guests and, once again, always round up your estimates. 6 bites when preceding a meal. 4 – 6 bites per hour when hors-d’oeuvres are the meal.
Seriously. While there is no perfect formula to calculate how much party food and drink you’ll need, there are some basic guidelines that usually ensure a successful party. The easiest rule is the “One Pound Rule.” Provide one pound of food for each adult guest (not including drinks or dessert).
A few articles have suggested that caterers’ base is a total of one pound to one and one quarter pound of food per person at a buffet (that’s for everythingmain course, sides, salad, etc). Feeding America suggests that 1.2 pounds (19.2 ounces oz) of food equals a meal.
Poultry, meat or fish – 6 ounces when you have one main dish, 8 ounces when you offer two or more main courses. Rice, grains – 1.5 ounces as a side dish, 2 ounces in a main dish such as risotto. Pasta – 2 ounces for a side dish, 3 ounces for a first course, 4 ounces for a main dish