Atwater Conversion Factors
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The following table shows the calories per gram for a variety of foods. The data makes it clear that although the 4-4-9 method of calculating calories is simple - it is also only a very crude approximation of actual values.

Food ItemProtein
(cal/gm)
Carbohydrates
(cal/gm)
Fat
(cal/gm)
Alcohol
(cal/gm)
Baked Beans with Pork, Tomato Sauce3.504.008.80 -
Baked Beans with Tomato Sauce3.404.008.40 -
Barley3.553.958.37 -
Beans3.474.078.37 -
Beans, Refried3.504.108.90 -
Beef Tongue4.274.119.02 -
Beef4.27 - 9.02 -
Beef, Processed4.273.68 - 3.879.02 -
Beer3.874.128.376.93
Beet Sugar - 3.87 - -
Breakfast cereals1.82 - 3.822.80 - 4.168.37 - 8.80 -
Brown Rice3.41 - 3.824.12 - 4.168.37 -
Buckwheat3.373.788.37 -
Bulgur Wheat3.593.788.37 -
Food ItemProteinCarbohydratesFatAlcohol
Butter4.273.878.79 -
Cane Sugar - 3.87 - -
Carbonated Soft Drinks3.363.878.37 -
Cellophane3.474.078.37 -
Chili with Beans3.504.008.70 -
Chocolate1.831.338.37 -
Chow Mein Noodles3.934.128.93 -
Cocoa1.831.338.37 -
Coffee3.474.078.37 -
Corn Bran1.822.358.30 - 8.37 -
Corn flour2.733.958.37 -
Corn grits2.734.038.37 -
Cornmeal, Degermed3.464.168.37 -
Couscous4.054.128.37 -
Egg Noodles3.934.098.41 -
Food ItemProteinCarbohydratesFatAlcohol
Egg Noodles, Spinach3.884.088.41 -
Eggs4.363.689.02 -
Farina4.054.128.37 -
Fish4.27 - 9.02 -
Flours (average of Corn, Rice, Wheat)2.96 - 4.043.78 - 4.128.37 -
French Fried Potatoes2.804.008.80 -
Fruit - Flavored Drinks3.363.908.37 -
Fruits, Canned3.363.60 - 3.788.37 -
Fruits, Raw3.362.48 - 3.608.37 -
Lemonade3.363.808.37 -
Limeade3.363.808.37 -
Long Rice Noodles3.474.078.37 -
Macaroni, Regular3.914.128.37 -
Macaroni, Vegetable3.864.118.37 -
Macaroni, Whole wheat3.593.788.37 -
Milk and Milk Products4.273.878.79 -
Food ItemProteinCarbohydratesFatAlcohol
Millet3.874.128.37 -
Mushrooms2.623.488.37 -
Nuts3.474.078.37 -
Oat Bran1.822.358.30 - 8.37 -
Peas3.474.078.37 -
Pork4.273.68 - 3.879.02 -
Potato Salad3.604.008.90 -
Potatoes2.783.488.37 -
Poultry4.273.879.02 -
Processed meats4.273.68 - 3.879.02 -
Quinoa3.474.078.37 -
Rice and Pasta with Seasonings3.874.148.37 -
Rice Bran1.822.358.30 - 8.37 -
Rice, Brown3.414.128.37 -
Rice, White3.824.168.37 -
Food ItemProteinCarbohydratesFatAlcohol
Rye3.233.998.37 -
Semolina4.054.128.37 -
Shellfish4.274.119.02 -
Soba Noodles3.373.788.37 -
Somen Noodles3.914.128.37 -
Sorghum0.914.038.37 -
Soy Bean Flour3.474.078.37 -
Soy Beans3.474.078.37 -
Spaghetti, Regular3.914.128.37 -
Spaghetti, Vegetable3.864.118.37 -
Spaghetti, Whole wheat3.593.788.37 -
Spouted Wheat3.593.788.37 -
Tea, Unsweetened (all)2.443.57 - 3.808.37 -
Tomato Sauce2.603.708.40 -
Food ItemProteinCarbohydratesFatAlcohol
Triticale3.323.828.37 -
Vegetables (average of all)2.443.578.37 -
Wheat (except Whole Wheat)4.054.128.37 -
Wheat Bran1.822.358.30 - 8.37 -
Wheat Germ3.593.788.37 -
Whiskey - 4.12 - 6.93
White Rice3.41 - 3.824.12 - 4.168.37 -
Whole wheat3.593.788.37 -
Whole Wheat3.593.788.37 -
Wild Rice3.553.958.37 -
Wine3.363.928.376.93
Zucchini2.003.708.40 -
Food ItemProteinCarbohydratesFatAlcohol


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