# Calorie Calculations

Divide fat calories by the kilocalories

Fat – 9 kcal

12g x 9kcal= 108 kcal

108kcal / 150 kcal = .72

.72 x 100 = 72% total calories from fat

2. How many grams of protein are in a 2400kcal diet with 15% of total kcal from protein?

Grams / total kcal = total percentage of kcal from the protein Protein – 4kcal

X / 2400kcal = .15 (15%)

2400kcal x .15 = 360

360 / 4kcal= 90 gm of protein

3. A 1500 kcal diet is 65% carbohydrate. How many kcal come from CHO? How many grams of CHO?

1500kcal = 65% carbohydrate

Carbohydrate = 4kcal

Formula for kcal

Kcal / 1500kcal = 65 % of carbohydrates

X / 1500kcal = .65 (65%)

.65 x 1500 kcal = 975 kcal com from CHO

Formula for grams

Grams of carbohydrates x 4kcal / g = 975 kcal from CHO

975 kcal / 4kcal/g = 243.75 gm of CHO

4. Calculate the grams of fat in a food containing 240 kcal that has 35% of kcal from fat.

Fat = 4kcal

Grams of fat / 240kcal = .35 (35%)

.35 x 240kcal = 84kcal from fat

X x 9kcal = 84 kcal

84 kcal / 9kcal = 9.33 gm of fat

5. Assume that on a particular day you consume 290grams of carbohydrate, 60g fat, and 70g protein. How many kcal did you consume? Determine the percentage of your total energy intake derived from each nutrient.

Carb = 4kcal

Fat = 9 kcal

Protein = 4kcal

Formula for kcal for Carbohydrates

(290gm x 4kcal) + (60gm x 9kcal) + 70gm x 4kcal) = X

1160kcal + 540kcal + 280kcal = 1980 kcal was consumed

Formula for percentage of Carbohydrates

(1160kcal / 1980kcal) 100 = .59

59 %

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