Macronutrients
Calculator
Results
- Carbohydrate
- 250.0000 g/day
- Protein
- 100.0000 g/day
- Fat
- 66.6667 g/day
User-selected calorie distribution across macronutrients
- Carbohydrate100%
Selected allocation with adult AMDR context
| Carbohydrate | 50.00 | 250.0000 | 45–65% |
| Protein | 20.00 | 100.0000 | 10–35% |
| Fat | 30.00 | 66.6667 | 20–35% |
Formula
G = C × P / 100 / K- C
- 2000
- P
- 50/20/30
- K
- 4/4/9
= 250.0000/100.0000/66.6667 g
Note
This calculator converts your selected calorie shares with 4/4/9 kcal per gram. AMDR bands are general adult references, not a personal prescription; clinical needs may differ.
More in Health
See all →Frequently asked questions
How does this calculator split my calories into protein, carbs and fat?+
It starts from your total daily calorie target and applies percentage splits (for example, 30% protein, 40% carbs, 30% fat) or fixed protein-per-kilogram targets, then converts each macronutrient's calories into grams using their energy density: 4 calories per gram for protein and carbs, 9 for fat. The exact split can usually be adjusted based on your goals.
Why does protein use a different calculation basis than carbs and fat?+
Protein needs are often set relative to body weight or lean body mass (such as 1.6-2.2 g/kg for active individuals) because protein requirements relate more to muscle maintenance than to total energy needs. Carbs and fat then typically fill the remaining calorie budget based on personal preference and activity type.
What macronutrient split is best for weight loss versus muscle gain?+
There's no single best split for everyone, but higher protein is generally recommended during weight loss to preserve muscle, while carb intake is often increased around training for muscle gain and performance. Total calorie balance still matters more than the exact macro ratio for weight change itself.
Why do my macro grams not perfectly add up to my calorie target?+
Small rounding differences occur because gram amounts are rounded to whole numbers for practicality, which can shift the actual calorie total slightly from the target. This is a minor and expected effect, not a calculation error.
Do I need to hit these macro numbers exactly every day?+
No, these figures are targets to guide your choices, and being within a reasonable range consistently matters far more than hitting an exact gram count on any single day. Weekly averages are a more realistic and sustainable way to think about macro tracking.