Macronutrient Distribution Calculator

Macronutrient Distribution is evaluated from Daily Calorie Goal, Macro Ratio Preset and Body Weight. The calculation reports Carbohydrates, Protein and Fat.

Results

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About the Macronutrient Distribution Calculator

Macronutrient Distribution is treated here as a quantitative relation between Daily Calorie Goal, Macro Ratio Preset and Body Weight and Carbohydrates, Protein, Fat and Protein per lb bodyweight.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Carbs (g) = total calories x carb% / 4. Protein (g) = total calories x protein% / 4. Fat (g) = total calories x fat% / 9.

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Carbs (g) = total calories x carb% / 4. Protein (g) = total calories x protein% / 4. Fat (g) = total calories x fat% / 9.

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Balanced diet: 2,000 cal, 40/30/30 split

Inputs

calories: 2000 macro_preset: 40-30-30 body_weight_lbs: 165

Carbohydrates: 200 g/day. Protein: 150 g/day. Fat: 67 g/day. Protein per lb bodyweight: 0.91 g/lb. Carb%: 40%. Protein%: 30%. Fat%: 30%

With Daily Calorie Goal = 2,000, Macro Ratio Preset = 40-30-30 and Body Weight = 165 as the stated inputs, the result is Carbohydrates = 200 g/day, Protein = 150 g/day and Fat = 67 g/day. Each value corresponds to the declared output fields.

Example 2: Keto diet: 1,800 cal, 5/25/70 ratio, 180 lb person

Inputs

calories: 1800 macro_preset: 5-25-70 body_weight_lbs: 180

Carbohydrates: 23 g/day. Protein: 113 g/day. Fat: 140 g/day. Protein per lb bodyweight: 0.63 g/lb. Carb%: 5%. Protein%: 25%. Fat%: 70%

With Daily Calorie Goal = 1,800, Macro Ratio Preset = 5-25-70 and Body Weight = 180 as the stated inputs, the result is Carbohydrates = 23 g/day, Protein = 113 g/day and Fat = 140 g/day. Each value corresponds to the declared output fields.

Example 3: Muscle gain: 3,000 cal, 30/40/30, 200 lb lifter

Inputs

calories: 3000 macro_preset: 30-40-30 body_weight_lbs: 200

Carbohydrates: 225 g/day. Protein: 300 g/day. Fat: 100 g/day. Protein per lb bodyweight: 1.5 g/lb. Carb%: 30%. Protein%: 40%. Fat%: 30%

With Daily Calorie Goal = 3,000, Macro Ratio Preset = 30-40-30 and Body Weight = 200 as the stated inputs, the result is Carbohydrates = 225 g/day, Protein = 300 g/day and Fat = 100 g/day. Each value corresponds to the declared output fields.

Example 4: Weight loss: 1,500 cal, 30/35/35 ratio, 170 lb woman

Inputs

calories: 1500 macro_preset: 30-35-35 body_weight_lbs: 170

Carbohydrates: 113 g/day. Protein: 131 g/day. Fat: 58 g/day. Protein per lb bodyweight: 0.77 g/lb. Carb%: 30%. Protein%: 35%. Fat%: 35%

With Daily Calorie Goal = 1,500, Macro Ratio Preset = 30-35-35 and Body Weight = 170 as the stated inputs, the result is Carbohydrates = 113 g/day, Protein = 131 g/day and Fat = 58 g/day. Each value corresponds to the declared output fields.

Common Use Cases

Calculate daily protein, carb, and fat targets
Set up an IIFYM or flexible dieting plan
Adjust macros for weight loss, muscle gain, or maintenance