Alright, so I am a huge fan of home cooked meals. I cook almost every day. I find it really easy to make individually portioned meals for myself and figure the calories for said meal. However, I'm having difficulties with large meals. I made spaghetti this weekend and I want to make sure I did the math correctly. I started off by getting the calorie/fat content on the nutrition facts area of each package of ingredients. I multiplied the stated calories by the amount of servings in each (since nutrition facts are labelled for one serving instead of the entire container.) I also added the total ingredients together in ounces. I then divided the total meal calorie count (4380) with the total ounces (88) to figure that each ounce contains 50 calories. 8 oz=1 cup so therefor 1 cup of my spaghetti contains 400 calories. Is this the correct way to figure the calories for a large meal? Sorry if that is a little confusing; it's a lot of math lol.