How to track macros: a practical beginner's guide

What are macros?

Macros — short for macronutrients — are the three nutrients that give your body energy: protein, carbohydrates, and fat. Each has a known energy value:

• Protein — about 4 calories per gram
• Carbohydrate — about 4 calories per gram
• Fat — about 9 calories per gram

Because these add up to your total calories, tracking macros is a more detailed version of calorie counting. It tells you not just how much you ate, but what those calories were made of — which matters for muscle, energy, and how full you feel.

Why track macros instead of just calories?

For weight change, total calories matter most. But two diets with the same calories can feel and perform very differently. Hitting enough protein helps preserve muscle in a deficit and supports recovery when training. Balancing carbs and fat affects energy and satiety. If your goal is body composition — not just the number on the scale — macros give you the extra control.

How to calculate your macros

You don't need a perfect formula to start. Follow these steps and refine as you go:

1. Set your daily calorie target. Estimate your maintenance calories, then adjust: a small deficit to lose fat, maintenance to stay the same, or a small surplus to build muscle. Macros are divided out of this number.
2. Set protein first. Protein protects muscle and keeps you full. A practical range is about 1.6–2.2g per kg of bodyweight. Multiply grams by 4 to get protein calories.
3. Split the remaining calories between carbs and fat. Subtract protein calories from your daily total, then divide what's left between carbohydrates (4 kcal/g) and fat (9 kcal/g) based on your preference and how you train.
4. Log every meal. Record food by search or barcode as you eat. A tracking app fills in protein, carbs, and fat automatically so you don't do the maths.
5. Review your daily summary and adjust. Check calories and macros remaining through the day, and review trends weekly. Adjust targets if progress stalls for two to three weeks.

A common beginner split is roughly 30% protein, 40% carbohydrate, and 30% fat, but treat it as a starting point rather than a rule. Protein target first, then divide the rest.

A quick worked example

Say your daily target is 2,000 calories and you weigh 70kg:

• Protein: 70kg × 2g = 140g → 560 calories
• Remaining calories: 2,000 − 560 = 1,440
• Split those, e.g. 60% carbs / 40% fat → ~216g carbs and ~64g fat

That gives clear daily targets: 140g protein, ~216g carbs, ~64g fat.

The easiest way to track macros day to day

Doing this by hand is tedious. A calorie and macro tracking app removes the friction: you log a food by search or barcode, and it fills in protein, carbs, and fat automatically, then shows what you have left for the day.

This is exactly what ChowTracker is built for — fast logging and a clear daily summary of calories and macros on iPhone and Android. See how ChowTracker works for the full workflow.

Common macro-tracking mistakes

• Guessing portions. Eyeballing quantities is where most errors creep in. Weigh foods where you can, especially calorie-dense ones like oils, nut butters, and grains.
• Chasing perfection. Being within about 5–10g of your protein target and close on calories most days is enough. Consistency beats precision.
• Ignoring liquids and extras. Drinks, sauces, and cooking oil all count. Log them too.
• Never adjusting. If progress stalls for two to three weeks, revisit your calorie target and macros.

Frequently asked questions

This guide is general information, not medical or dietetic advice. If you have a health condition or specific goals, consider speaking with a qualified professional.