Once you know your daily calorie target, the next step is understanding how to distribute those calories between the three macronutrients — protein, carbohydrates, and fat. This is known as your macro split. Different diet goals use very different macro ratios, and getting this right can significantly affect your energy levels, satiety, body composition, and athletic performance.
Enter your daily calorie goal below and select your diet type. Not sure of your calorie goal? Use our Daily Calorie Needs Calculator first to find your TDEE.
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Understanding Macronutrients
Protein provides 4 calories per gram. It is essential for building and repairing muscle tissue, supporting immune function, and producing enzymes and hormones. Protein is the most satiating macronutrient, meaning it keeps you fuller for longer.
Carbohydrates provide 4 calories per gram. They are the body's preferred energy source, particularly for high-intensity exercise and brain function. Complex carbohydrates from whole grains, vegetables, and legumes digest slowly and provide sustained energy.
Fat provides 9 calories per gram — more than double protein or carbohydrates. Dietary fat is essential for hormone production, absorption of fat-soluble vitamins (A, D, E, K), and brain health. The type of fat matters — unsaturated fats from nuts, olive oil, and fish are beneficial, while excessive saturated fat may increase cardiovascular risk.
Diet Type Guide
Not sure which diet type to select? Here is a quick overview of each option:
Weight Loss
Balanced Weight Loss — a moderate, sustainable approach with an even macro split. Suitable for most people without specific dietary restrictions.
Low Carb Weight Loss — reduces carbohydrates to accelerate fat loss. A practical middle ground between standard dieting and strict keto.
High Protein Weight Loss — maximises protein to preserve muscle during a calorie deficit. Ideal for anyone doing resistance training while losing weight.
Muscle Building
Muscle Gain (Bulk) — higher carbohydrates to fuel training and support muscle synthesis. Suited for a caloric surplus phase.
Lean Bulk — a conservative bulk that minimises fat gain while still providing enough fuel for muscle growth.
Body Recomposition — aims to simultaneously lose fat and gain muscle. Best suited for beginners or people returning to training after a break.
Maintenance
Balanced Maintenance — a sustainable everyday split for people happy with their current weight and body composition.
Active / Athletic Maintenance — higher carbohydrates to fuel regular intense training sessions.
Endurance Athlete — maximises carbohydrates for sustained aerobic performance. Used by marathon runners, cyclists, and triathletes.
Low Carb Diets
Low Carb — reduces carbs below standard levels without going into ketosis. Practical for blood sugar management and moderate fat loss.
Ketogenic (Keto) — very high fat, very low carb (under 5% of calories). Forces the body into ketosis where fat becomes the primary fuel source.
Atkins Induction — the strictest Atkins phase — approximately 20g carbs per day to initiate rapid weight loss and ketosis.
Atkins Ongoing — gradually reintroduces carbohydrates while maintaining fat loss.
Carnivore / Zero Carb — eliminates carbohydrates almost entirely. Protein and fat only from animal products.
High Protein
High Protein — significantly elevated protein above standard recommendations. Popular for muscle retention, body recomposition, and satiety.
Very High Protein (Bodybuilding) — extreme protein intake used by competitive bodybuilders during cutting or contest preparation phases.
Plant Based
Vegan Balanced — standard macro split adapted for plant-based diets. Slightly higher carbohydrates since plant protein sources often come bundled with carbs.
Vegan High Protein — maximises protein within a plant-based framework using tofu, tempeh, seitan, legumes, and protein supplements.
Medical / Therapeutic
Diabetic Friendly — reduces carbohydrates to support blood sugar management. Not a substitute for medical advice — consult your doctor.
Heart Healthy — reduces total fat in line with cardiovascular health guidelines. Emphasises complex carbs and lean protein.
Zone Diet (40/30/30) — the Zone Diet by Dr Barry Sears: 40% carbs, 30% protein, 30% fat. Designed to reduce inflammation and stabilise energy.
Paleo — eliminates grains, legumes, and dairy. Higher protein and fat from animal sources, carbs from vegetables and fruit only.
❓ Frequently Asked Questions
Macros (macronutrients) are protein, carbohydrates, and fat — the three nutrients that provide calories. Tracking macros instead of just total calories helps you control body composition (muscle vs fat), energy levels, and satiety.
Two diets with the same calorie count but different macro splits can produce very different results in terms of weight loss, muscle retention, and how full you feel.
First determine your daily calorie target (use a TDEE calculator and adjust for your goal). Then split those calories into a percentage of protein, carbs, and fat based on your goal.
Convert percentages to grams: protein and carbs are 4 calories per gram, fat is 9 calories per gram. For example, 2,000 calories at 30% protein equals 600 protein calories, which is 150g of protein.
A common evidence-supported split for weight loss is 30% protein, 40% carbs, 30% fat. Higher protein (30-40%) helps preserve lean muscle while you lose weight and increases satiety.
The exact carb and fat balance is largely personal preference — both low-carb (35/25/40) and balanced (30/40/30) approaches work for weight loss when total calories are controlled.
For general health, 0.36 grams per pound of bodyweight is the RDA minimum. For active people, 0.7-1.0 grams per pound is the typical research-backed range.
For muscle gain and weight loss with muscle preservation, 0.8-1.0 grams per pound is widely supported. Higher than 1.0g/lb is rarely necessary outside of competitive bodybuilding.
Yes. Weight loss is driven by calorie deficit, not specific macro ratios. Tracking macros becomes useful when total calories alone isn't producing the result you want.
For example, losing weight but feeling weak (low protein), losing muscle along with fat (low protein), or feeling exhausted (very low carbs or fat). Macro tracking helps refine quality, not just quantity.
Standard ketogenic macros are roughly 70-75% fat, 20-25% protein, and 5-10% carbs (typically under 30g net carbs per day). The high fat is needed to maintain ketosis.
Protein should be moderate — too much can be converted to glucose. The 5% carb cap is the defining feature; missing this number takes you out of ketosis.
Most people notice changes in energy and satiety within 1-2 weeks. Body composition changes (muscle gain, fat loss) typically take 4-8 weeks to be visible, longer to be dramatic.
Consistency matters more than precision — hitting targets 80% of the time over months beats hitting them 100% of the time for two weeks then quitting.
No. Most people benefit from tracking for 4-12 weeks initially to learn portion sizes and macro content of common foods.
After that, many transition to occasional tracking, tracking only one meal per day, or eyeballing portions based on calibrated experience. Tracking is a learning tool, not a permanent lifestyle requirement.
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