Calorie Calculation Exercises

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 derived from carbohydrates 8) Formula for percentage of fat 9) (540kcal/g / 1980kcal)100 = .27 10) 27% of your total energy derived from fat 11) Formula for percentage of protein 12) (28kcal/g / 1980kcal)100 = .14 13) 14% of your total energy derived from fat

Calculations Homework

Name Tara St. Andre Date August 29, 2010

Show mathematical process of all your work

1. A food contains 20 grams of fat. How many kcal are contributed by fat? 1) Food = 20grams of fat 2) Fat = 9kilocalories per gram 3) 20g x 9kcal/g = 180 4) 180kcal are contributed by fat

2. A food containing 240 kcal has 10grams of protein. What % of kcalories comes from protein? 1) Food = 240kcal, Protein = 10g 2) Protein = 4kcal/g 3) 10g x 4kcal/g = 40kcal/g 4) 40kcal/g / 240kcal = 0.17 5) 0.17 x 100 = 17 6) 17% of kcal comes from protein

3. A food contains 10grams of fat, 2 grams protein and 25 grams of carbohydrate. How many kcal are in this food? 1) Food = 10g of fat, Protein = 2g, Carbohydrates = 25g 2) (10g x 9kcal/g) + (2g x 4kcal/g) + (25g x 4kcal/g) 3) 90kcals + 8kcals + 100kcals = 198kcals 4) 198kcals are in this food

4.
1485kcal for carbohydrates A 2700 kcal diet contains 55% carbohydrate, 20% protein, and 25% fat. How many kcal and grams are provided for each nutrient? 1) 2700kcal = 55% carbohydrate, 20% protein, 25% fat 2) Carb = 4kcal, Protein = 4kcal, Fat = 9kcal 3) Kcal formula for carbohydrate 4) x = kcal x / 2700kcal = .55(55% carbohydrate into decimal format) 5) x = .55 x 2700kcal = 1485kcal of carbohydrate 6) Grams formula for carbohydrate 7) x = grams x multiplied by 4kcal = 1485kcal 8) x = 1485kcal / 4kcal = 371.25grams of carbohydrates 9) Kcal formula for protein 10) x = kcal x / 2700kcal = .20(20% protein into decimal format) 11) x = .20 x 2700kcal = 540kcal of protein 12) Grams formula for protein 13) x = grams x multiplied by 4kcal = 540kcal 14) x = 540kcal / 4kcal = 135grams of protein 15) Kcal formula for fat 16) x = kcal x / 2700kcal = .25(25% fat into decimal format) 17) x = .25 x 2700kcal = 675kcal of fat 18) Grams formula for fat 19) x = grams x multiplied by 9kcal = 675kcal 20) x = 675kcal / 9kcal = 75grams of
fat

5. A food label has the following values: Total kcal- 360; Total fat 20gm; Total carb-25 gm. How much protein is in this food? 1) Total kcal = 360, Total fat = 20gm, Total carb = 25gm 2) Fat = 9kcal/g, Carb = 4kcal/g, Protein = 4kcal/g 3) (20g x 9kcal/g) + (25g x 4kcal/g) + (x multiplied by 4kcal/g) 4) 180kcal/g + 100kcal/g + x multiplied by 4 = 360kcal 5) 360kcal – 280kcal/g = 80kcal/g 6) 80kcal/g / 4kcal = 20gm of protein is in this food