How to calculate calories from different sources

Not all calories are the same — and this simple truth changes the whole muscle-building game. If you want to build muscle with minimal body fat gain, you need to think about where your calories come from, not just how many you take in.

Why not all calories are equal

In a bulking phase, people load up on calories — some come from protein, some from carbohydrates, some from fat. But the source directly affects your body fat percentage. Two trainees can eat exactly the same number of calories and end up with completely different body compositions if their macro split differs.

Milos Sarcev — one of bodybuilding’s best-known coaches and diet strategists — has been spreading this message for years. The approach focuses not only on the amount of calories, but above all on the sources those calories come from.

Honestly: bulking is easy only on paper. In practice, the challenge is to add muscle without excess fat — and this is where macro distribution plays a decisive role.

Calories and protein: why protein is the foundation

Sarcev firmly believes that a large amount of protein is the foundation of muscle growth. The recommendation is specific: eat 1.5–2 g of protein per pound of body weight every day, or roughly 3–4 g per kilogram of body weight.

That is considerably more than standard health recommendations, but given bodybuilding-level training volume and goals, the approach is well justified. Calories from protein behave differently in the body than calories from carbohydrates — protein supports muscle protein synthesis, speeds up recovery and helps prevent muscle mass breakdown even when you are in a slight calorie surplus.

So what actually happens when protein intake is low? The body looks elsewhere for the missing building material — and often that means existing muscle tissue. A high protein intake is therefore not just a preference, but a strategic choice.

Calculating calories: the protein-to-carbohydrate ratio

The classic bodybuilding macro split has been 60% carbohydrates and 40% protein. Sarcev, however, prefers a 50/50 split. In Sarcev’s view, calories from protein are the more valuable ones — and that choice shows in Sarcev’s own nutrition.

Sarcev’s body weight fluctuates between 240–250 pounds, or 108–112 kg. Accordingly, Sarcev eats 500 g of protein every day, which comes to 2000 calories. Plus 2000 calories of carbohydrates to balance metabolism. In total, 4000 calories, split in half between the two main macronutrients.

That is a sensible level for a professional athlete. Your needs depend on your weight, training volume and goals — but the principle stays the same: before you think about quantity, think about distribution.

How many calories you need to build muscle

The simple truth: to build muscle, you need more calories than you burn. But too large a surplus brings body fat, not just muscle. The goal is to find the golden mean — a surplus big enough for growth, but not so big that body fat starts to dominate.

Practical steps for calculating your calorie needs:

• Calculate your basal metabolic rate (BMR) based on body weight, height, age and sex.
• Multiply it by an activity factor — for an active trainee, this falls in the range of 1.55–1.725.
• Add 200–400 calories a day as a surplus for building muscle.
• Divide the total into macros: 50% from protein, 50% from carbohydrates, as Sarcev recommends.
• Track your results for 4–6 weeks and adjust as needed — if body fat is increasing too quickly, reduce the surplus.

The body responds to the combination of a calorie surplus and training stress. A higher-protein diet helps ensure that most of that surplus goes into muscle rather than fat tissue. This is the heart of Sarcev’s whole philosophy: calculating calories is not a goal in itself — the goal is to put those calories to work.

FAQ

Is a 50/50 split of protein and carbohydrates right for everyone?

Not necessarily. Sarcev recommends it in the bulking phase for people with a bodybuilding training focus. For endurance athletes, a higher share of carbohydrates is generally more suitable.

How many grams of protein per kilogram should I eat?

Sarcev recommends 3–4 g per kilogram of body weight (1.5–2 g per pound). That is at the high end, but well justified at bodybuilding-level training volume. For the average recreational exerciser, 1.6–2.2 g per kilogram is enough.

Does the source of calories really affect body fat percentage?

Yes. Even at the same calorie intake, macro distribution — especially the share of protein — influences how much body fat changes during a bulking phase. A high protein intake helps preserve muscle and limit fat accumulation.

Author: joker

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