How much protein should I eat per day to build muscle?

Evidence-based sports nutrition guidelines recommend 0.7 to 1.0 grams of protein per pound of body weight (1.6 to 2.2 grams per kg) for building and preserving muscle.

How do you calculate macro grams from total calories and percentages?

Protein Grams = (Total Calories × Protein %) / 4. Carb Grams = (Total Calories × Carb %) / 4. Fat Grams = (Total Calories × Fat %) / 9.

Why are dietary fats essential in a meal plan?

Dietary fats are necessary for hormone production (including testosterone and estrogen), cell membrane integrity, and absorption of fat-soluble vitamins (A, D, E, K). Never drop fats below 15%–20% of total calories.

What is a standard ketogenic diet macro split?

A standard keto diet typically allocates 70%–75% of calories to Fats, 20%–25% to Protein, and 5%–10% (under 20–50 grams) to net Carbohydrates.

What is the difference between total carbs and net carbs?

Net carbs represent carbohydrates that impact blood sugar: `Net Carbs = Total Carbohydrates - Dietary Fiber - Sugar Alcohols`.

How many calories are in one gram of protein, carbohydrate, and fat?

Protein and carbohydrates each provide 4 calories per gram, while dietary fats provide 9 calories per gram.

Health & Fitness Cluster

Macro Calculator (Protein, Fat & Carbohydrate Grams)

Calculate custom daily macronutrient targets in grams and calories based on your body composition goals.

TL;DR: Macro Calculator converts your daily caloric target into exact gram allocations for protein, dietary fats, and carbohydrates based on your fitness goals (cutting, bulking, keto).

Daily calories

Protein %

Carbs %

Fat %

How Many Calories Are in One Gram of Protein, Fat, and Carbohydrates?

The caloric values of macronutrients (Atwater values) are: Protein = 4 calories per gram; Carbohydrates = 4 calories per gram; Dietary Fats = 9 calories per gram; Alcohol = 7 calories per gram. Tracking macros ensures you preserve lean muscle while meeting energy requirements.

How to Use the Macro Calculator

Our Macro Calculator performs high-precision mathematical operations directly in your browser with zero latency and complete client-side privacy.

Enter your Age, Gender, Height, Weight, and Activity Level.
Select your Nutrition Goal: Fat Loss (Cut), Maintenance, Muscle Gain (Bulk), or Keto.
Choose a macro distribution ratio (Balanced 40/30/30, High Protein 45/30/25, Low Carb, or Keto 70/25/5).
Click 'Calculate Macros' to view daily targets in both grams and total calories.
Use the gram totals to structure your meal prep and fitness tracking apps.

Mathematical Formula & Equations

Distributes total daily caloric targets across macronutrient ratios tailored to athletic goals and bodybuilding.

\[ \text{Calories} = (\text{Protein (g)} \times 4) + (\text{Carbs (g)} \times 4) + (\text{Fats (g)} \times 9) \]

Calculation Example

For a 2,000 kcal diet targeting 40% protein, 35% carbs, 25% fats: 200g Protein (800 kcal), 175g Carbs (700 kcal), 55g Fats (500 kcal).

100% Client-Side Privacy & Data Security

All calculations, amortization schedules, variables, and sensitive numerical datasets execute 100% locally in your web browser memory. Your financial, medical, and personal values are never transmitted, logged, or uploaded to any external server.

Frequently Asked Questions

: Evidence-based sports nutrition guidelines recommend 0.7 to 1.0 grams of protein per pound of body weight (1.6 to 2.2 grams per kg) for building and preserving muscle.
: Protein Grams = (Total Calories × Protein %) / 4. Carb Grams = (Total Calories × Carb %) / 4. Fat Grams = (Total Calories × Fat %) / 9.
: Dietary fats are necessary for hormone production (including testosterone and estrogen), cell membrane integrity, and absorption of fat-soluble vitamins (A, D, E, K). Never drop fats below 15%–20% of total calories.
: A standard keto diet typically allocates 70%–75% of calories to Fats, 20%–25% to Protein, and 5%–10% (under 20–50 grams) to net Carbohydrates.
: Net carbs represent carbohydrates that impact blood sugar: `Net Carbs = Total Carbohydrates - Dietary Fiber - Sugar Alcohols`.
: Protein and carbohydrates each provide 4 calories per gram, while dietary fats provide 9 calories per gram.

Cite This Calculator

Need to reference this online calculator in a financial proposal, academic paper, blog post, or classroom curriculum? Copy a citation below.

NexLove.org. (2026). Macro Calculator [Online Calculation Tool]. https://nexlove.org/tools/macro-calculator

“Macro Calculator.” NexLove.org, 2026, nexlove.org/tools/macro-calculator.

NexLove.org (2026) Macro Calculator. Available at: https://nexlove.org/tools/macro-calculator (Accessed: 2026).

@misc{nexlove_macro_calculator,
  title = {Macro Calculator},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/macro-calculator}
}

Embed This Tool

Add the live Macro Calculator to your own website with this snippet — it loads the real, working calculator in an iframe.

<iframe src="https://nexlove.org/embed/macro-calculator.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Macro Calculator — NexLove.org" loading="lazy"></iframe>

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