How to Use the Macro Calculator

Enter your TDEE — use the TDEE Calculator first to get your daily calorie need, then adjust for your goal.
Select your goal — fat loss, muscle gain, or maintenance. Each preset adjusts protein, carb, and fat ratios accordingly.
Set protein target — typically 0.7–1g per pound of bodyweight (1.6–2.2g per kg). Higher end for active people in a calorie deficit.
Adjust carbs and fats — the remaining calories after protein are split between carbs and fat based on preference and activity level.
Read gram targets — use these daily targets with a food tracking app (MyFitnessPal, Cronometer) to hit your macros consistently.

🥩 Protein is the priority macro: Of the three macronutrients, protein has the most impact on body composition. It preserves muscle during fat loss, supports muscle growth, provides the highest satiety per calorie, and has the highest thermic effect. Get protein right first — carbs and fats are flexible within your remaining calories.

Understanding Macronutrients

🥩 Protein (4 cal/g)

Essential for muscle repair and growth, immune function, enzyme production, and hormone synthesis. Cannot be stored like fat or glycogen — must be consumed daily. Sources: meat, fish, eggs, dairy, legumes, tofu. Target: 1.6–2.2g per kg of bodyweight.

🍞 Carbohydrates (4 cal/g)

Primary fuel source for high-intensity exercise and brain function. Stored as glycogen in muscles and liver. Not essential (body can produce glucose from protein/fat) but performance and energy suffer without adequate carbs for active people. Sources: grains, fruits, vegetables, legumes.

🥑 Fats (9 cal/g)

Essential for hormone production (testosterone, estrogen), fat-soluble vitamin absorption (A, D, E, K), brain function, and joint health. Cannot be eliminated — minimum 20% of calories should come from fat. Sources: oils, nuts, avocado, fatty fish, dairy.

📊 Macro Ratios by Goal

Fat loss: 35–40% protein, 30–35% carbs, 25–30% fat. Muscle gain: 25–30% protein, 45–50% carbs, 25% fat. Endurance athlete: 20% protein, 55–60% carbs, 20–25% fat. These are starting points — individual response varies significantly.

🔄 Flexible Dieting (IIFYM)

'If It Fits Your Macros' — any food is acceptable as long as daily macro targets are met. Research shows similar body composition results to 'clean eating' when total macros and calories are matched. Provides psychological flexibility that improves long-term adherence.

⚡ Timing Matters Less

The research on nutrient timing (eating carbs before/after training, protein within 30 minutes) shows modest effects. Total daily intake matters far more than timing. If precise timing is stressful, prioritise hitting daily targets and worry about timing only after consistency is established.

Hitting Your Macros Consistently

Building a macro-friendly meal structure

Structure meals around protein first. Choose a protein source for each meal (chicken, fish, eggs, Greek yogurt, legumes), then add carbohydrates and fats to reach calorie targets. This approach naturally achieves high-protein intake without constant calculation. 3–4 meals with 30–40g protein each easily hits daily protein targets for most people.

High protein food list

Chicken breast (31g/100g), tuna (29g/100g), Greek yogurt (10g/100g), cottage cheese (11g/100g), eggs (13g/100g), beef (26g/100g), lentils (9g/100g cooked), tofu (8g/100g). These protein-dense foods form the backbone of any macro-optimised diet regardless of overall dietary pattern.

Tracking without obsessing

Track macros precisely for 4–6 weeks to build accurate food knowledge, then transition to intuitive eating using the patterns learned. Most people who track for this period develop accurate enough portion estimation that they no longer need daily tracking. Return to tracking during diet phases or when results stall.

🎯 Macro priority order: 1) Hit total calories (weight management). 2) Hit protein target (body composition). 3) Hit fat minimum (hormonal health). 4) Fill remaining with carbs (performance and preference). Following this priority order means even imperfect macro days still achieve the most important goals.

Frequently Asked Questions

What are macronutrients?

Macronutrients are the three main nutrients that provide energy: Protein (4 kcal/g), Carbohydrates (4 kcal/g), and Fat (9 kcal/g). Unlike micronutrients (vitamins, minerals), macros are needed in large quantities and form the bulk of your diet.

How much protein do I need?

For muscle building or retention: 1.6–2.2g per kg of body weight per day. For general health: 0.8–1.2g/kg. For weight loss: higher protein (2.0–2.4g/kg) preserves muscle mass during a calorie deficit. Protein is the most important macro to hit consistently.

What is a ketogenic diet?

A ketogenic diet restricts carbohydrates to 5–10% of calories (typically under 20–50g/day). This forces the body into ketosis — burning fat for fuel instead of glucose. It can be effective for weight loss but requires strict adherence and may cause initial fatigue.

How do I track macros?

Use a food tracking app (MyFitnessPal, Cronometer) that shows macros per meal. Weigh food with a kitchen scale for accuracy — measuring cups are imprecise for calorie-dense foods like nuts and oils. Track for 2–4 weeks to build an intuitive sense of portions.