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Captain Workout tools

Calorie & Macro Calculator

Estimate your maintenance calories, compare cutting and lean-gain targets, then get a practical protein, carbohydrate and fat split.

Your profile

We use the Mifflin–St Jeor equation and your activity level.

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How it works

Your resting energy estimate is multiplied by an activity factor to produce a starting maintenance target.

Choose conservatively

Activity is easy to overestimate. When between two levels, start with the lower one and let your weight trend guide adjustments.

Reading your macros

Select the calorie target you want to follow, then choose a balanced, higher-protein or lower-carb split. Protein and carbs provide 4 kcal per gram; fat provides 9.