Macronutrient Calculator

The following calculator facilitates planning a diet. The energy content of a diet is dependent on the quantities of three macronutrients: Proteins, Lipids, and Carbohydrates. Fiber, which consists of undigestible carbohydrates, contributes minimally to the total energy content, but its weight is included in the total carbohydrate content.

Due to the dynamic nature of the calculations, it is better to specify 1) the amount of fiber, then the percentages of 2) protein and 3) lipids, and finally, 4) the total calories. The percentage of carbohydrate is determined by difference. Click OK after changing a field.

The USDA button and the ZONE button set the macronutrient levels for a 2000-calorie diet with 25 grams of fiber for the standard USDA Dietary Reference Intakes (DRI)[1] and the Zone diet[2], respectively.

Protein and fat are necessary nutrients. Warning messages are given if the protein goes below 38 grams, or if the lipids go below 15 grams. It is generally recommended that a diet should have at least 0.8 grams of protein per kilogram of body weight and approximately 15 grams of essential fatty acids.