Understanding This Calculator
Macronutrients — protein, carbohydrates, and fat — each supply calories at a fixed rate (protein and carbs: 4 kcal/g; fat: 9 kcal/g). Once you know your total daily calorie target, splitting it into a macro ratio lets you hit specific body-composition or performance goals rather than just tracking total intake.
There’s no single ‘correct’ split — a balanced ratio suits general health, low-carb approaches suit some metabolic goals, and higher protein supports muscle retention during a calorie deficit.
- calories your total daily calorie target
- ratio % allocated to each macro by goal
| Style | Protein | Carbs | Fat |
|---|---|---|---|
| Balanced | 30% | 40% | 30% |
| Low-carb | 35% | 20% | 45% |
| High-protein | 40% | 35% | 25% |
Frequently Asked Questions
Why does fat use 9 kcal/g instead of 4?
Fat is more energy-dense than protein or carbohydrate — each gram yields roughly 9 kilocalories when metabolized, compared to 4 for the other two macros.
How much protein do I actually need?
General guidance is 0.7-1g per pound of bodyweight for active individuals, more during a cut to preserve muscle. This calculator’s percentages translate to reasonable gram targets across most calorie levels.