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nutrition · fundamentals

What are macros?

"Macros" is short for macronutrients - the three nutrients that give food its energy: protein, carbohydrate, and fat. This guide explains what each one does, how many calories they carry, and the simple protein-first method coaches use to turn those numbers into client targets without overcomplicating it.

By Markus Evers · Updated June 2026

the short answer

Macros (macronutrients) are the three nutrients that provide energy: protein, carbohydrate, and fat. Protein and carbohydrate each supply about 4 calories per gram, and fat supplies about 9. "Counting macros" means tracking grams of each to hit a daily target set around a goal like fat loss, muscle gain, or maintenance.

This article is general nutrition education for coaches and clients, not medical or dietetic advice. Individual needs vary - refer anyone with a medical condition, eating disorder, or clinical nutrition question to a registered dietitian or doctor.

the basics

The three macronutrients - and what they do.

Every food is built from some mix of three macronutrients. Protein builds and repairs tissue, including muscle, and is the most filling of the three. Carbohydrate is the body's main quick-access fuel, especially for hard training. Fat supports hormone production, cell health, and the absorption of certain vitamins. You need all three - the goal is the right balance for the person and their goal, not eliminating any one of them.

The other piece is energy density. Because fat carries about 9 calories per gram against roughly 4 for protein and carbs, a small change in fat intake moves total calories more than the same change in carbs. That single fact explains a lot of how targets get built - and why fat usually gets a floor rather than a free-for-all.

Macros differ from how your metabolism processes that energy, and they sit alongside micronutrients - the vitamins and minerals that don't carry calories but keep the system running. Counting macros is just a way to make the big energy levers visible.

the numbers

Calories per gram, at a glance.

These are the standard reference values that turn grams of food into calories on any nutrition label. Memorize the 4 / 4 / 9 split for protein, carbs, and fat - it's the whole math behind macro tracking.

Macro What it does and where it comes from Energy
Protein Builds and repairs muscle, keeps you full, and protects lean mass while dieting. Sources: meat, fish, eggs, dairy, legumes, tofu. About 4 calories per gram.
Carbohydrate The body's main quick-access fuel, especially for hard training. Sources: grains, fruit, potatoes, rice, oats, vegetables. About 4 calories per gram.
Fat Supports hormones, cell health, and absorption of some vitamins. Sources: oils, nuts, seeds, avocado, fatty fish, dairy. About 9 calories per gram.
Alcohol (not a macro) Provides energy but no nutritional role. Worth tracking because it adds calories that crowd out the three real macros. About 7 calories per gram.

A quick worked example: 40 g protein, 50 g carbs, and 15 g fat is (40 × 4) + (50 × 4) + (15 × 9) = 160 + 200 + 135 = 495 calories. Add up every meal that way and you have both your calorie total and your macro split. A macro calculator does this conversion automatically once you set a goal.

step by step

How to set macro targets, in order.

There's a simple, evidence-based sequence: calories, then protein, then fat, then carbs fill the rest. Setting them in this order is what keeps the targets both effective and easy to adjust. For the full client-facing version, see how to calculate TDEE and macros for clients.

  1. 01

    Set calories first

    Macros sit inside a calorie target, so start there. Estimate maintenance calories from total daily energy expenditure, then set a modest deficit for fat loss or a small surplus for muscle gain. The number is a starting estimate, not a verdict - you adjust it based on real-world progress over two to three weeks.

  2. 02

    Set protein

    Protein comes first because it does the most work: preserving muscle, controlling appetite, and supporting recovery. A common evidence-based range is roughly 1.6 to 2.2 grams per kilogram of bodyweight, often higher when dieting hard. Lock this in before touching the other two macros.

  3. 03

    Set fat

    Next set fat, since a minimum is needed for hormones and general health. A practical floor is around 0.5 to 1 gram per kilogram of bodyweight. Where you land in that range is mostly preference - some people feel and perform better on slightly higher fat, others on slightly higher carbs.

  4. 04

    Fill the rest with carbs

    Whatever calories remain after protein and fat become carbohydrate. Carbs are the flexible lever: they fuel training and are easy to adjust week to week. This is why the order matters - protein and fat have floors, carbs absorb the rest of the budget.

  5. 05

    Track, then adjust

    Log food consistently for a couple of weeks and watch the trend in weight, measurements, and energy. If progress stalls, change one variable at a time. Macro targets are a hypothesis you test against the body in front of you, not a fixed prescription.

Two honest caveats. First, the gram-per-kilogram ranges above are population starting points - bodyweight, training, and preference shift them, so always treat the first number as a draft. Second, a "slow metabolism" is mostly overstated as a reason targets fail; far more often the issue is under-logging or untracked extras. If you want to dial protein specifically, our protein calculator gives a quick range, a protein powder can make the daily target easier to hit, and the reverse dieting guide covers what really happens when intake has been low for a long time.

in practice

Tracking macros - and what doesn't matter.

Tracking just means logging what you eat and matching it against your targets. Most people use a food-logging app and a kitchen scale at first, then rely on learned portions later. The point is feedback, not perfection - consistent rough tracking beats flawless tracking you abandon in a week. The approach known as flexible dieting (IIFYM) is built on exactly this: hit your macro targets and you have real freedom in the specific foods.

A few myths waste a lot of effort. The "anabolic window" - the belief you must eat protein within minutes of finishing a workout - is largely a myth; total daily protein matters most, and spreading it across meals is plenty. Carbs don't inherently make you gain fat; excess total calories do - which is also why alcohol quietly stalls fat loss, since its 7 calories per gram crowd out the three real macros. And you don't need to eliminate fat or carbs to lose weight - you need an overall deficit. Once those are clear, advanced tactics like carb cycling are options to layer on, not prerequisites.

This is also where the line of scope sits. Coaches coach nutrition habits and targets - building consistency, setting sensible macros, and adjusting them from progress. Anything clinical or medical - a diagnosed condition, disordered eating, a specialized therapeutic diet - belongs with a registered dietitian or doctor. If you coach this for a living, our guide on how to do nutrition coaching online covers building the habit side properly.

macros, for coaches

Turning macros into a client system.

Setting one person's macros is easy. Doing it for a whole client list, keeping the targets visible, and adjusting from real check-ins is where a platform helps. Coachway is built for online fitness and nutrition coaches who want the targets, the plans, and the tracking in one branded place instead of scattered across a spreadsheet and three apps.

Macro targets and meal plans

Set per-client macro and calorie targets, then build them into native meal plans from a library of 1,100+ recipes - so the numbers turn into food a client can actually follow.

Food and recipe logging

Clients log food and recipes in a native branded app, in their own language, so you can see how the real week compares to the plan instead of guessing.

Habit and progress tracking

Track habits, weight, and measurements over time, then adjust macros from the trend at check-in. The whole loop - target, plan, log, adjust - lives in one nutrition coaching software stack.

Coachway is built as the operating system for online fitness and nutrition coaches running roughly 10 to 80 clients. Pricing is EUR 69/mo for up to 5 clients, then EUR 9 per additional active client, with all features included - so the tool cost stays predictable as your client list grows. See the full breakdown on the pricing page, or learn the craft side in our overview of becoming an online nutrition coach.

questions people ask

Frequently asked questions.

What are macros?

Macros, short for macronutrients, are the three nutrients that supply your body with energy: protein, carbohydrate, and fat. Each provides calories - roughly 4 per gram for protein and carbs, and 9 per gram for fat. "Counting macros" means tracking how many grams of each you eat in a day to hit a target, rather than only counting total calories.

How many calories are in each macro?

Protein and carbohydrate each provide about 4 calories per gram, and fat provides about 9 calories per gram - so fat is more than twice as energy-dense. Alcohol sits at about 7 calories per gram but is not a true macronutrient because it serves no structural or nutritional role. These figures are the standard reference values used to convert grams of food into calories on any nutrition label.

How do I set my macros?

Set calories first from your total daily energy expenditure, then work in order: protein first (around 1.6 to 2.2 g per kg of bodyweight), fat next (a floor near 0.5 to 1 g per kg), and carbohydrate fills whatever calories remain. Protein and fat have minimums for muscle and health; carbs are the flexible lever you adjust.

Which macro is most important?

No single macro is universally "most important," but protein usually gets set first because it does the most for body composition: it preserves muscle, controls appetite, and supports recovery, and most people under-eat it. Total calories still decide whether you gain or lose weight. Carbs and fat are then balanced to fuel training and protect health.

Do I have to count macros to lose weight?

No. Weight loss comes from a calorie deficit, and many people get there with simple habits - more protein, more whole foods, sensible portions - without ever weighing food. Counting macros is one tool that adds precision and is useful for clients chasing a specific physique or performance goal. For most people, a coach builds the habit first and only layers in tracking when the goal genuinely calls for it.

Does meal timing of macros matter?

For most people, far less than the internet suggests. The "anabolic window" - the idea you must eat protein immediately after training - is largely overstated; total protein across the whole day is what drives muscle repair. Spreading protein reasonably across meals helps, and timing carbs around hard sessions can aid performance, but daily totals do the heavy lifting.

This article is general nutrition education for coaches and clients, not medical or dietetic advice. Individual needs vary, and macro ranges are population starting points - refer anyone with a medical condition, an eating disorder, or a clinical nutrition question to a registered dietitian or doctor, and keep coaching within your scope of practice.

Once the numbers make sense, the next step is the math itself - our guide on how to calculate TDEE and macros for clients walks through setting targets you can stand behind.

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