Worked examples, in Nutrition Planning
Macro Calculator Examples
Calorie targets set the ceiling; macro targets tell you what fills it. The split between protein, carbohydrates, and fat changes meaningfully depending on your goal: cutting, bulking, or endurance sport. These worked examples show how a macro calculator adapts its outputs to different real-world scenarios.
4 examples. Published Mar 12, 2026. Updated Mar 27, 2026. By AI Fit Hub.
Worked examples
See the inputs and outcome together
Each scenario keeps the starting point, the outcome, and the actual lesson in one place so the page reads like a decision notebook, not a data dump.
- 1
Maintenance, balanced split
An 80 kg person with a 2,200 calorie maintenance keeps weight steady on a balanced macro split.
Targets land at 2,200 calories, 144 g protein, 203 g carbs, and 90 g fat.
Calories
2200
Goal
Maintain
Split
Balanced
Weight Kg
80
Protein is set from body weight first, then carbs and fat fill the remaining calories. Anchoring protein to weight rather than a flat percentage is what keeps the target sensible across different body sizes.
- 2
Cutting
The same person switches to a cut on a balanced split.
Targets drop to 2,210 calories, but protein rises to 176 g, with 188 g carbs and 84 g fat.
Tdee
2600
Goal
Cut
Split
Balanced
Weight Kg
80
Calories fall while protein climbs, which is exactly right for a cut. Higher protein in a deficit protects muscle and keeps you full, so the carbs and fat take the cut, not the protein.
- 3
Bulking
The same person moves to a lean bulk on a balanced split.
Targets rise to 2,860 calories, 160 g protein, 278 g carbs, and 123 g fat.
Tdee
2600
Goal
Bulk
Split
Balanced
Weight Kg
80
The surplus lands mostly in carbs to fuel training, with protein held a notch above maintenance. A modest 10% surplus like this favours lean gains over fat, which beats a dirty bulk for body composition.
- 4
Maintenance, higher-carb split
Back to maintenance, but choosing a higher-carb split for endurance training.
Calories and protein hold at 2,600 and 144 g, but carbs jump to 329 g while fat falls to 79 g.
Tdee
2600
Goal
Maintain
Split
Higher Carb
Weight Kg
80
Same calories, very different fuel mix. Shifting toward carbs suits high-volume endurance work, while the split barely touches protein. Pick the split for the training you actually do, not the diet trend of the month.
Patterns
Run the numbers next
- Nutrition Protein Intake Calculator
Get daily protein targets based on training level and goal.
Sources
- Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (2005) , National Academies Press
- Macronutrient considerations for the sport of bodybuilding , Sports Medicine (2004) — Lambert, Frank & Evans
Keep the topic connected
- Formula Macronutrient Ratio Formula
Macronutrient ratio formula: protein 1.6–2.2 g/kg, fat 0.6–1.0 g/kg (≥20% of calories), carbs = (total cal − protein·4 − fat·9) / 4.
- Learn What Is Macros? Simply Explained
Understand macros (macronutrients): carbohydrates, proteins, and fats. Learn how these essential nutrients power the body, impact health, and support.