Macros for Beginners: Protein, Carbs and Fat Explained

Macros sound technical, but the idea is simple. Almost everything you eat is made of three things: protein, carbohydrate and fat. Get a sensible amount of each and your training, recovery and energy tend to look after themselves.

This guide explains what each macro does, the rough ranges that reputable bodies suggest, a way to portion meals using nothing but your hand, and an honest answer on whether you need to track anything at all.

What are macros?

Macros is short for macronutrients, the nutrients your body needs in large amounts. There are three: protein, carbohydrate and fat. Each one supplies energy, measured in calories (kcal). Protein and carbohydrate provide about 4 kcal per gram. Fat provides about 9 kcal per gram.

Your total calories are simply your macros added together. So calories and macros are two views of the same plate. Calories tell you how much you are eating. Macros tell you what it is made of.

What does protein do, and how much do you need?

Protein supplies the building blocks your body uses to repair and build tissue, including muscle after a run or a strength session. Many people also find that meals with a decent serving of protein keep them fuller for longer.

The UK reference figure for adults is 0.75g per kg of bodyweight a day, which works out at roughly 45g to 56g for most adults. That is a baseline to cover basic needs, not a target for someone who trains. Published sports nutrition guidance for active people sits higher, at around 1.2g to 2.0g per kg a day. For a 70kg person that is roughly 84g to 140g. You do not need the top of that range to make progress, and spreading protein across your meals is usually easier than cramming it into dinner.

Everyday sources include chicken, fish, eggs, Greek yoghurt, milk, tofu, beans and lentils.

What do carbs do, and how much do you need?

Carbohydrate is your body's go-to fuel for harder efforts, such as intervals, hill reps, HIIT and heavy sets. It is stored in your muscles and liver as glycogen.

UK government guidance is that around half of your daily energy should come from carbohydrate, mostly starchy and higher-fibre foods. It also recommends about 30g of fibre a day and keeping free sugars (the kind added to food and drink, or found in honey, syrups and fruit juice) to no more than 5% of your energy.

Sports nutrition guidance scales carbs to how much you train: roughly 3g to 5g per kg of bodyweight a day for light activity, and 5g to 7g per kg for around an hour of moderate exercise a day. Only people doing a lot of endurance training need more than that. Good everyday sources are oats, rice, pasta, potatoes, wholegrain bread, fruit and beans.

What does fat do, and how much do you need?

Fat is not the enemy. It provides essential fatty acids your body cannot make, helps you absorb vitamins A, D, E and K, and supplies steady energy for easier, longer efforts.

UK guidance is that total fat should make up no more than about 35% of your food energy, with saturated fat no more than about 11%. At the other end, sports nutrition guidance generally advises against dropping below about 20% of your energy from fat for long periods. So for most people who train, somewhere between 20% and 35% is a sensible window.

Lean towards olive oil, nuts, seeds, avocado and oily fish, and go a little easier on pastries, fried food and processed meat.

Ranges are taken from UK government dietary recommendations and published sports nutrition guidance. They are population-level starting points, not personal prescriptions.

How do you turn those ranges into your own numbers?

If you like numbers, work in this order. Set protein first, because it is the one most beginners under-eat. Match carbs to how much you train. Let fat fill in the rest of your energy.

Take a 70kg person who trains four times a week. A middle-of-the-range protein figure of 1.6g per kg gives about 110g a day. Carbs at 3g to 5g per kg gives 210g to 350g, nearer the top on hard training days and nearer the bottom on rest days. Fat then makes up the remainder, which for many people lands somewhere around 60g to 80g.

Treat these as rough guide rails, not rules. Your total energy needs set the overall size of the plate, and that depends on your size, your job and how active you are. Being within a sensible range most days matters far more than hitting an exact gram.

What is the hand-portion method?

The hand-portion method is a way of building meals that many nutrition coaches teach to beginners. Instead of weighing food or logging it in an app, you use your own hand as the measuring tool. It works because your hand is always with you and roughly scales with your body, so a bigger person naturally gets a bigger portion.

A simple starting point is one to two of each at every meal, across three or four meals a day. Smaller or less active people start nearer one. Larger or more active people start nearer two. A plate of two palms of chicken, two cupped hands of rice, a fist or two of vegetables and a thumb of olive oil is a solid training-day dinner.

Then adjust. Give it a couple of weeks and notice your hunger, your energy and how your sessions feel. Always hungry or flat in training? Add a cupped hand of carbs to the meals around your workouts. It is an estimate, not a measurement, and that is the point.

Do you need to track macros at all?

For most beginners, no. If your meals usually include a protein source, some starchy carbs, plenty of vegetables or fruit and a little fat, you are already doing what macro tracking is trying to achieve. Consistent training and regular, balanced meals will take you a long way before the fine detail matters.

Tracking can still be useful in a couple of situations:

• A short audit. Logging your food for a week or two can show you what your normal day really looks like. Many people find they eat far less protein than they assumed.
• A specific goal. If you are building towards a marathon or trying to gain muscle, numbers can help you check you are fuelling enough.

It is also fine to skip it. If logging every meal makes you anxious, takes the joy out of eating, or if you have ever had a difficult relationship with food, leave the app alone and use the hand method or a balanced plate instead. Speak to your GP if food is causing you worry.

One more thing about food labels. The reference intakes printed on UK packaging (2,000 kcal, 70g of fat, 260g of carbohydrate and 50g of protein) are a guide for an average adult. They help you compare products. They are not a personal target, and regular training usually pushes your protein and carb needs above them.

What are the most common macro mistakes?

• Chasing exact percentages. A 40/30/30 split is not magic. A sensible range, most days, is what counts.
• Cutting out a whole macro. Very low carb or very low fat approaches are hard to sustain and can leave training feeling flat.
• Saving all your protein for dinner. A palm-sized portion at each meal is easier to manage than one huge serving.
• Forgetting fibre, fruit and vegetables. You can hit your macros with poor food choices. Quality still matters.
• Under-fuelling hard sessions. Skimping on carbs before intervals or a long run rarely ends well.

How should your macros change around training?

Keep protein steady every day, and let carbs rise and fall with your training. On days with a hard run, a HIIT class or a big strength session, add an extra cupped hand or two of carbs to the meals before and after. On rest days and easy days, your normal plate is plenty.

This is much easier when you can see your whole week in one place. Edge treats running, strength and HIIT as one plan, so you know which days are the hard ones and can fuel them properly. Edge is a free fitness app with 20,000+ members. Edge Pro, from £19.99 a month with a free 7-day trial, gives you a fully personalised plan across running, strength, HIIT and mobility, ready in 15 minutes, with a real coach to message anytime.

This article is general guidance, not medical advice. If you are new to exercise, returning from injury, pregnant, or managing a health condition, speak to your GP before starting, and see a physio for any niggle that does not settle.