Macros % wrong in pie charts?

sportsguy574 · April 4, 2015 12:32PM

I feel the macro percentages are wrong in the pie chart. For breakfast I had 8 grams of fat, 33 carbs, and 29 protein. The fat shows 21% when I believe it should be around 11%. Fat % always seems too high. The others seem wrong also. Any ideas?

CyberTone · April 4, 2015 3:10PM

The reason is that fat provides more than twice the amount of Calories per gram than protein and carbohydrates.

Calories consumed = Calories from (Carbs + Fat + Protein + Alcohol)
= g Carbs x (4 Cals/g Carbs) + g Fat x (9 Cals/g Fat) + g Protein x (4 Cals/g Protein) + g Alcohol x (7 Cals/g Alcohol)

In your example:

Total Calories = 33g Carbs x (4 Cals/g Carbs) + 8g Fat x (9 Cals/g Fat) + 29g Protein x (4 Cals/g Protein)
= 132 Cals Carbs + 72 Cals Fat + 116 Cals Protein
= 320 Cals Total

Percent from Carbs = (132 Cals Carbs / 320 Cals Total) x 100 = 41%

Percent from Fat = (72 Cals Fat / 320 Cals Total) x 100 = 23%

Percent from Protein = (116 Cals Protein / 320 Cals Total) x 100 = 36%

The calculations will be slightly off due to rounding.

sportsguy574 · April 4, 2015 3:48PM

Thanks that clears it up.

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Macros % wrong in pie charts?

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