How much dry spaghetti do I need to serve 26 people?

A good rule of thumb is to plan on 2 ounces (57 grams) of dry pasta per person, if you are serving a side dish as well. If pasta is the main dish, plan on 4 ounces (114 grams) per person. Using the 2-ounce (57 gram) measurement, 26 people will require 52 ounces (1.5 kg) of dry spaghetti.