Calculating Nutritional Values

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Calorie Calculation Exercises

1. A serving of two cookies has 150 kcal and 12 grams of fat. What percentage of total calories is fat?
1) Divide fat calories by the total kilocalories
2) Fat = 9kcal/g
3) 12g x 9kcal/g = 108kcal/g
4) 108kcal / 150kcal = .72
5) .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? 1) Grams / total kcal = total percentage of kcal from protein 2) Protein = 4kcal/g
3) x / 2400kcal = .15(15% of total kcal from protein decimal format) 4) 2400kcal x .15 = 360
5) 360 / 4kcal/g = 90gm of protein

3. A 1500 kcal diet is 65% carbohydrate. How many kcal come from CHO? How many grams of CHO? 1) 1500kcal = 65% carbohydrate
2) Carbohydrate = 4kcal/g
3) Formula for kcal
4) Kcal / 1500kcal = 65% of carbohydrates
5) x / 1500kcal = .65(65% of carbohydrates in decimal format) 6) .65 x 1500kcal = 975kcal come from CHO
7) Formula for grams
8) Grams of carbohydrates x 4kcal/g = 975kcal from CHO
9) 975kcal / 4kcal/g = 243.75gm of CHO

4. Calculate the grams of fat in a food containing 240 kcal that has 35% of kcal from fat. 1) Fat = 4kcal/g
2) Grams of fat / 240kcal = .35(35% of kcal from fat into decimal format) 3) .35 x 240kcal = 84kcal from fat
4) x multiplied by 9kcal/g = 84kcal
5) 84kcal/ 9kcal/g = 9.33gm 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. 1) Carb = 4kcal/g, Fat = 9kcal/g, Protein = 4kcal/g

2) Formula for kcal for carbohydrates
3) (290gm x 4kcal/g) + (60gm x 9kcal/g) + (70gm x 4kcal/g) = x 4) 1160kcal/g + 540kcal/g + 280kcal/g = 1980kcal that was consumed 5) Formula for percentage of carbohydrates
6) (1160kcal/g / 1980kcal)100 = .59
7) 59% of your total energy...
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