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Macro Calculator 2026
Turn grams into calories — and calories into a macro split that fits your goal.
A macro calculator is a tool that converts the grams of protein, carbohydrate and fat in your diet into calories and percentage splits, so you can plan meals against a daily target. Protein and carbohydrate provide about 4 kcal per gram, fat provides about 9 kcal per gram and alcohol provides about 7 kcal per gram.
Start Calculating ↓Grams to calories & split
Split a calorie target by preset
About the Macro Calculator
Use the gram inputs to check a meal or a full day, or use the preset splitter to divide a calorie target into balanced, high-protein, low-carb or keto proportions. Percentages are a planning guide, not a prescription — total calories, food quality and consistency matter just as much.
Macro Calculator: Key Facts to Know
- ✓ Protein and carbs = 4 kcal per gram, fat = 9 kcal per gram, alcohol = 7 kcal per gram.
- ✓ Balanced preset used here: 30% protein, 40% carbs, 30% fat.
- ✓ High-protein preset: 40% protein, 30% carbs, 30% fat — often used for muscle gain or satiety.
- ✓ Keto preset: 20% protein, 5% carbs, 75% fat.
- ✓ To find grams from a percentage: (calories × percentage) ÷ kcal per gram for that macro.
Results from the Macro Calculator are estimates for general educational use on Smoothie Nutrition Calculator. They are not medical or dietetic advice — for personal medical nutrition questions, including pregnancy, diabetes and clinical nutrition such as TPN, always work with your doctor or a registered dietitian.
Frequently Asked Questions
Protein is about 4 kcal per gram, carbohydrate is about 4 kcal per gram, fat is about 9 kcal per gram and alcohol is about 7 kcal per gram.
Macro Calculator Guides & Articles
All 4 of our guides for this calculator — every one built on the same data as the tool above.
Macro Calculator 2026
A macro calculator is a tool that converts the grams of protein, carbohydrate and fat in your diet into calories and percentage splits, so you can plan meals against a daily target. Protein and carbohydrate provide about 4 kcal per gram, fat provides about 9 kcal per gram and alcohol provides about 7 kcal per gram.
Read guide →
🎯Macro Calculator 2026 | Tips Mistakes
Most wrong results from the Macro Calculator come from input mistakes, not the maths. Here are the five that matter most — and the fix for each.
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🎯Macro Calculator 2026 | Deep Dive
Beyond the basics: the reference values, assumptions and limits behind the Macro Calculator, and how dietitians sanity-check its results.
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🎯Macro Calculator 2026 | Worked Examples
Numbers land differently in context. Three everyday scenarios run through the Macro Calculator, with the input that mattered most in each.
Read guide →
More Nutrition Calculators
Every calculator on Smoothie Nutrition Calculator works the same way — pick from the dropdowns and see live totals.