Calories tell you how much energy is in your food. Macros — short for macronutrients — tell you where that energy comes from. Tracking them can help you feel fuller, keep more muscle while losing weight, and understand why two meals with the same calories can feel completely different.
This guide covers the basics without the jargon.
What are macros?
There are three main macronutrients, plus alcohol, which also provides energy:
| Macro | Calories per gram | Where you find it |
|---|---|---|
| Protein | 4 kcal | Meat, chicken, fish, eggs, dairy, lentils, beans, tofu |
| Carbohydrate | 4 kcal | Rice, bread, roti, pasta, potatoes, fruit, sugar |
| Fat | 9 kcal | Oil, ghee, butter, nuts, seeds, fatty meat, cheese |
| Alcohol | 7 kcal | Alcoholic drinks |
That table explains most of nutrition labelling. If a food has 10 g protein, 30 g carbs, and 5 g fat, it has roughly (10 × 4) + (30 × 4) + (5 × 9) = 205 kcal.
It also explains why fat adds up quickly: gram for gram, it carries more than twice the energy of protein or carbs.
Why track macros, not just calories?
You can lose or gain weight by tracking calories alone. Macros add a few useful things:
- Protein helps you stay full. Meals with a good protein portion tend to be more satisfying, which makes a calorie target easier to stick to.
- Protein helps protect muscle. When you eat less to lose weight, adequate protein — combined with some strength training — helps you keep muscle rather than lose it alongside fat.
- Carbs fuel activity. If you’re active, cutting carbs too far can leave you tired during workouts.
- Fat is essential, but dense. You need some for health and to absorb certain vitamins, but small amounts carry a lot of calories.
How much protein do you need?
The official Recommended Dietary Allowance for adults is 0.8 g of protein per kilogram of body weight per day — the amount that covers basic needs for most healthy people. For a 70 kg adult, that’s about 56 g a day.
Many people who are active or trying to lose fat while keeping muscle aim higher than the minimum. If you have kidney disease or another medical condition, talk to your doctor before increasing protein.
To get a feel for portions, here are rounded USDA values:
| Food | Portion | Protein | Calories |
|---|---|---|---|
| Chicken breast, cooked | 100 g | 31 g | 165 kcal |
| Eggs | 2 large | 12–13 g | 145 kcal |
| Lentils, cooked | 1 cup (about 200 g) | 18 g | 230 kcal |
| Chickpeas, cooked | 1 cup (about 164 g) | 15 g | 270 kcal |
| Plain whole-milk yogurt | 200 g | 7 g | 120 kcal |
Spreading protein across your meals — rather than leaving it all for dinner — is an easy, practical habit.
Carbs and fat: there’s no single right split
You’ll see many “ideal” macro ratios online. In practice, the best split is one you can keep eating day after day. Plenty of people do well with higher-carb diets; others prefer more fat. Once your protein is adequate, carbs and fat can flex around your preferences, culture, and activity.
Two things that do matter:
- Fibre. Choose whole grains, beans, lentils, vegetables, and fruit for much of your carbohydrate. Fibre helps with fullness and digestion.
- Cooking fat. Most of the fat in home-cooked meals comes from oil or ghee, not the food itself. Count it — see our guide to counting calories without weighing food.
How to start tracking macros
- Track calories first for a week. Get used to logging consistently before adding detail.
- Then add protein. For most people, protein is the only macro worth actively targeting at the start. Check whether each meal has a palm-sized portion.
- Glance at carbs and fat. You don’t need targets yet. Notice which meals are heavy on one or the other.
- Adjust one thing at a time. For example, add an egg to breakfast or swap a second roti for a bowl of daal.
Let an app do the arithmetic
Multiplying grams by 4 and 9 for every meal gets old fast. Jawan estimates calories, protein, carbs, and fat from a meal photo or a short description, and shows you the assumptions behind the estimate. You review and correct it, save it, and see your day’s totals in one place.
The estimate is a starting point, not a verdict — especially for mixed dishes and anything cooked in oil. If you’re curious how accurate photo estimates are, read Do AI photo calorie trackers actually work?
Common beginner mistakes
- Aiming for perfection. Close and consistent beats precise and abandoned.
- Ignoring drinks. Milky tea, juice, and smoothies carry carbs, fat, and calories.
- Treating “healthy” fats as free. Nuts, olive oil, and ghee are nutritious and very calorie-dense.
- Counting raw and cooked weights interchangeably. 100 g of raw rice and 100 g of cooked rice are very different amounts. Stick to one and use the matching value.
Sources
- Nutrient values: USDA FoodData Central, rounded.
- Protein RDA: Dietary Reference Intakes, National Academies of Sciences, Engineering, and Medicine.