Macros and Protein: Nutrition Beyond Calories
Calories decide your weight, but macros decide how you feel and perform — a clear guide to protein, carbs, fat, fiber and hydration, how much of each to eat, and how to hit your targets.
Macro Split Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Carbohydrates
250
- Protein
- 150
- Fat
- 44
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Macro Split Calculator
The Macro Split Calculator works out your carbohydrates, along with 2 related figures in an instant. Enter daily calories, carbs and protein and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the daily calories.
- Enter the carbs.
- Enter the protein.
- Enter the fat.
- Read off your carbohydrates, together with protein and fat — the calculator updates automatically, with no button to press.
Formula
The Macro Split Calculator uses the formula:
Carbohydrates = Daily calories × Carbs ÷ 100 ÷ 4
Worked example
For example, with daily calories of 2,000 kcal, carbs of 5%, protein of 3% and fat of 2%, the carbohydrates is 250.
| Daily calories | 2,000 kcal |
|---|---|
| Carbs | 5% |
| Protein | 3% |
| Fat | 2% |
| Carbohydrates | 250 |
|---|---|
| Protein | 150 |
| Fat | 44 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Protein
- A macronutrient essential for muscle repair and growth; needs scale with body weight and activity.
Frequently asked questions
Carbs and protein have 4 calories per gram and fat has 9. So grams = calories × percentage ÷ 100 ÷ calories-per-gram. At 2000 kcal with 50% carbs that is 250 g.
Yes. Carbs, protein and fat percentages should total 100% so they account for all your calories.
A balanced starting point is around 50% carbs, 30% protein and 20% fat, but the best split depends on your goals and activity.
Fat packs 9 calories per gram versus 4 for carbs and protein, so the same calories from fat work out to fewer grams.
The Macro Split Calculator uses the formula: Carbohydrates = Daily calories × Carbs ÷ 100 ÷ 4. For example, with daily calories of 2,000 kcal, carbs of 5%, protein of 3% and fat of 2%, the carbohydrates is 250.
Enter the daily calories. Enter the carbs. Enter the protein. Enter the fat. Read off your carbohydrates, together with protein and fat — the calculator updates automatically, with no button to press.
Related guides
Macro Split Table: Carbohydrates by Daily calories
Reference table of carbohydrates for Macro Split across a range of daily calories values — exact, engine-computed figures you can read off at a glance.
How to Calculate Macro Split: Formula, Steps & Examples
Learn how to calculate Macro Split — the formula explained step by step, with worked examples and a free calculator to check your answer.
Calories and Weight Loss: How It Really Works
The science of energy balance made simple — how many calories you burn, how a calorie deficit drives weight loss, why plateaus happen, and how to set a safe, sustainable target.