How to Read Nutritional Labels: Counting Calories and Macros the Right Way

You're standing in a supermarket aisle holding two yogurts with the same name from different manufacturers. At first glance they look identical. But open the label and the difference can be 50–80 kcal per serving. That is exactly why knowing how to read a nutritional label is not an optional skill — it is a basic tool for anyone who genuinely wants to control their diet.

In this guide you will learn how to count calories from label data, how to interpret macros on packaging correctly, and which mistakes to avoid when calculating.

Why Reading Nutritional Labels Matters

The label is the only reliable source of data for a specific product. Not an average figure from the internet, not a general database — the manufacturer's actual numbers for that particular batch.

Different manufacturers of the same product can differ substantially in their macros. A 5% fat cottage cheese from one brand contains 121 kcal per 100 g; from another it is 138 kcal. That may seem trivial, but if you eat that cottage cheese every day, the error accumulates to 500–600 kcal per week — almost an entire meal.

Estimating portions visually without label data leads to systematic errors. We tend to underestimate the calorie content of liquid and paste-like products and overestimate the volume of solid food. According to research published in the International Journal of Obesity (2006), people underreport consumed calories by 12–25% on average.

If you are just starting to track your diet, we recommend reading calorie counting for beginners: how to start without quitting on day two first — it covers the general logic of the process, while this article focuses specifically on working with labels.

Understanding a label is the foundational skill of mindful eating. Without it, any calculation becomes guesswork.

What Is Inside a Nutrition Facts Table: Breaking Down Every Element

A standard nutrition facts table on a Russian food package contains several rows. Let's go through each one.

Energy value is given in kcal and is sometimes duplicated in kJ. For practical purposes look at kcal: it is the familiar unit used by all apps and food diaries. 1 kcal = 4.187 kJ if you need to convert manually.

Protein is the building material for muscles, hormones and enzymes. According to WHO recommendations, the average daily requirement is 0.8 g per kg of body weight for an adult, and 1.6–2.2 g per kg during active training (based on a meta-analysis in the British Journal of Sports Medicine, 2018). For more on calculating your targets, see the recommended intake of protein, fat and carbohydrates: how to calculate your macros for your goal.

Fat on a label is split into "total" and "of which saturates." Saturated fats are the ones recommended to be limited: they are found in butter, fatty meat, coconut oil and palm oil. Unsaturated fats (olive oil, nuts, fish) are more beneficial. Pay attention to both rows.

Carbohydrates are also split into "total" and "of which sugars." A high sugar content alongside a small total carbohydrate figure is a marker of a product with fast carbs and a high glycaemic index.

Fibre and salt are not always listed, but when they are, take note. Fibre is important for satiety and digestive function, while excess salt (sodium) is associated with water retention and cardiovascular strain.

The "of which" row always specifies the preceding category. "Of which saturates" is a portion of total fat. "Of which sugars" is a portion of total carbohydrates. These values are not added to the total — they are already included in it.

If you would like a deeper understanding of what macros are and how these numbers relate to one another, read what macros (KBZHU) are in plain language.

Per 100 g or Per Serving: Which Column to Look At and Why It Is Critical

Most Russian labels state macros per 100 g of product. This is convenient for comparing different brands but requires a calculation based on your actual portion.

Some manufacturers also provide data per serving — in a separate column or in brackets. An important nuance: the manufacturer's "serving" and your actual serving may not match. A manufacturer may define a serving as 30 g while you eat 80 g. Always check how much the stated serving weighs.

The calculation formula:

Calories for your portion = (macros per 100 g × actual weight of portion) / 100

Example with yogurt:

• Label: 68 kcal per 100 g
• You poured a glass of yogurt weighing 150 g
• Calculation: (68 × 150) / 100 = 102 kcal

The same logic applies to protein, fat and carbohydrates — the formula is identical for all figures.

A common mistake is assuming you have eaten exactly 100 g without weighing. A pack of cottage cheese weighs 180 g, not 100 g. A standard glass of kefir is around 250 ml. Accurate calculation is impossible without kitchen scales. If you do not have scales, read how to count calories without scales: methods that work in real life.

Step-by-Step Instructions: How to Count Calories from a Nutritional Label

Let's walk through the process step by step — from the moment you pick up a product to recording it in your diary.

Step 1. Find the nutrition facts table on the label. It is usually on the back or side of the packaging, sometimes labelled "Nutritional Information" or "Nutrition Facts." Look at the table itself, not the large text on the front of the pack — that may be marketing copy.

Step 2. Determine the actual weight of your portion. Weigh the product on kitchen scales. If it is a liquid, 1 ml ≈ 1 g (for water and low-density drinks). For denser products (juices, kefir) use weight rather than volume.

Step 3. Apply the formula: (macros per 100 g × actual weight) / 100. Calculate separately for calories, protein, fat and carbohydrates.

Step 4. Record the result in your food diary or app. The key is to do this immediately, before you forget.

Step 5. Add up all meals for the day and compare with your daily target. For guidance on how to calculate it, read how many calories you need per day: how to calculate your target in 3 steps.

An important rule: count the product in the form in which you eat it. Raw buckwheat and cooked buckwheat are different products by weight. If the pack states the calorie content for the dry product, weigh it before cooking. If you are unsure, read more about the nuances in how to count calories when cooking at home.

How to Read the Ingredients List: What Hides Behind the Names

The nutrition facts table answers the question "how much," while the ingredients list answers "made from what." Both sections complement each other.

Ingredients are always listed in descending order by weight: whatever is most abundant comes first. If the first ingredient in a bread is wheat flour and the second is water, that is a straightforward composition. If the second ingredient is sugar, it is worth thinking twice.

Hidden sugars are one of the most common traps. Manufacturers use dozens of names: dextrose, fructose, maltose, glucose syrup, corn syrup, maltodextrin, fruit juice concentrate. If you see several such names in the ingredients list, the total sugar content may be significant even if none of them appears first.

Hidden fats: palm oil, hydrogenated vegetable fats, margarine, coconut oil — all of these are saturated or trans fats and contribute to the "fat" figure in the table.

Flavour enhancers (monosodium glutamate, E621) and preservatives do not technically affect macros, but their presence indicates the degree of processing. This matters for the overall picture of your diet, although it does not change the calorie count.

How do you cross-reference the ingredients with the table? If the first three items are oil, sugar and flour, and the table shows high fat and carbohydrate figures, the data is consistent. If the ingredients look "clean" but the fat content is unexpectedly high, check whether there are hidden fat sources listed under technical names.

Common Mistakes When Counting Calories from a Label

Knowing the formula is half the battle. The other half is understanding where mistakes most often occur.

Mistake 1: ignoring the pack weight and estimating by eye. You think you ate half a pack of cottage cheese — 100 g. The scales say 140 g. A 40 g discrepancy for full-fat cottage cheese is 60–70 extra kcal. Multiply that by 20 days a month and you have a significant margin of error.

Mistake 2: confusing data for raw and cooked states. Dry pasta changes shape but not calories: 100 g of dry pasta becomes 230–250 g after cooking. If you weigh cooked pasta and calculate using the dry figures, you will double-count the calories. Always clarify which state the label data refers to.

Mistake 3: not accounting for additions. A tablespoon of olive oil is around 120 kcal. Two tablespoons of mayonnaise — 130 kcal. A handful of grated cheese — 80–100 kcal. All of this is added to a dish but often goes unrecorded. Count every component separately.

Mistake 4: trusting labels that say "light," "diet" or "sugar-free." "Sugar-free" does not mean low in calories — the product may be high in fat. "Light" only means the product is lighter than the reference version of the same brand, not that it is low-calorie. Always check the table; do not rely on front-of-pack claims.

Mistake 5: counting only calories and ignoring macros. Two meals with identical calorie counts can have completely different effects on satiety, muscle mass and energy levels — depending on the ratio of protein, fat and carbohydrates. Full dietary control means tracking all four figures.

FAQ: Frequently Asked Questions

Do I need to weigh food every time, or can I learn to judge portions by eye?

In the early stages — yes, weigh every time. Our brains are poor at estimating volume visually, especially for calorie-dense foods: nuts, oils, cheeses. After 3–4 weeks of regular weighing you develop a visual reference for familiar products. At that point you can reduce how often you weigh — but it is still worth checking periodically so you do not drift off track.

What should I do if there is no nutrition facts table on the packaging?

This can happen with farm products, bulk goods or locally made items. In that case, use average values from reliable databases. Bear in mind, though, that these are approximate figures, not the exact numbers for a specific product.

How do I track calories for a home-cooked dish made from several ingredients?

Calculate the macros for each ingredient from its label before cooking, add them up, then weigh the finished dish and divide into portions. This method is described in more detail in how to count calories when cooking at home: a step-by-step guide.

Should fibre be subtracted from carbohydrates when counting?

In Russian practice, fibre is not usually subtracted from carbohydrates. In the American system it is often subtracted to give "net carbs." For basic calorie counting, use the total "carbohydrates" figure as stated on the label — this keeps you within a safe range.

How do I avoid errors when counting macros on a calorie deficit?

Consistently and accurately. A deficit only works when the counting is sufficiently precise. For more on building a deficit without mistakes, read calorie deficit for weight loss: how to calculate a safe minus.

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