Calculation of calories for weight loss: formula. How to determine your daily calorie intake

Why you need to count calories

Calorie calculation is based on the law of conservation of energy - one of the most important, fundamental laws of nature. It always works, which is why it is an important component of the most effective weight loss methods. Knowledge and understanding of this issue will help you effectively and successfully solve important problems related to weight loss and achieve your desired results.

From a biological point of view, one calorie is the required amount of energy that is expended to heat one gram of water by one degree Celsius under normal atmospheric conditions. This value is extremely small, so calorie intake per day is calculated in a larger value - kilocalorie.

Not every person thinks about how much energy the body spends to perform daily tasks. Scientists have found that on average the female body spends about one and a half thousand kilocalories to maintain vital functions. Due to this, breathing, heart rate, muscle tone, peristalsis, constant body temperature, and other processes occurring in the body are ensured. For men, this value is slightly larger, amounting to 1800 calories. This value has a special name - basal or basic metabolism. To determine it, special formulas or special devices are used - a body composition analyzer and a metabolograph.

The component is the main one, but in addition to it there are other energy costs. Physical activity also involves burning calories. A leisurely walk consumes about 150 kilocalories per hour, while intense sports can burn much more - up to 400-500. The calories consumed daily are used to support human life. All the energy that is not consumed by the body is stored. That is why for effective, noticeable weight loss it is necessary to create a daily energy deficit, the size of which should be about 500-700 calories. To get the desired effect, you can count calories yourself or use a ready-made menu.

Harris Benedict formula for weight loss

To lose weight, you should rely on the calorie intake according to the Harris-Benedict formula and stick to smaller parameters. To lose excess weight, you should consume less calories than you need per day, and also resort to optimal physical activity.

It is important to note that you need to consume at least 1200 kcal per day.

In order to maintain your weight within the limits you need, you should consume the daily amount of kcal, taking into account physical activity. In any case, periodic exercise will help you stay healthy. Before choosing this weight loss system, you should consider the following nuances:

• This calculation system is not suitable for obese people, since it often overestimates the individual kcal consumption rate;
• The calculation system is also not suitable for very muscular people, since it often underestimates the energy costs necessary to maintain the normal functioning of basic and additional body functions.

Taking into account the above nuances will help you use calculations to give your body an attractive silhouette, or maintain optimal weight. It is important to note that to minimize the risk and undesirable consequences, it is recommended to contact a professional nutritionist to carry out calculations on an individual basis.

Expert opinion

Considering that the basis for calorie counting is the law of conservation of energy - as fundamental a law of nature as, for example, gravity - we can say that calories are outdated or inconvenient, just like gravity. Try throwing a pen or pencil above you - and everything will become clear. The laws of nature always work. They are the basis of all effective weight loss methods. Knowledge and understanding of these rules helps you to be effective and successfully solve important problems, as well as issues related to weight loss. So what are calories?

1 calorie is the amount of energy required to heat 1 gram of water by 1 degree Celsius. This is a very small value, so calories are usually measured in thousands - kilocalories, kcal. A woman’s body spends about 1500 kcal daily to maintain vital functions (heart rate, breathing, muscle tone, peristalsis, body temperature and other processes), a man’s body about 1800 kcal. The amount of energy that the body spends to maintain life is called basal metabolism. To more accurately calculate this value, there are special devices - a body composition analyzer and a metabolograph.

This part of energy consumption is the main one, but not the only one. Physical activity also consumes energy, but somewhat less. For example, such active sports as swimming and cycling burn only 150-250 kcal of energy in 60 minutes, it all depends on the intensity of the workout. For noticeable weight loss, it is necessary to create an energy deficit equal to approximately 500-700 kcal from these figures, that is, women need to eat within 1200 kcal daily, men - about 1500 kcal for stable weight loss without harm to the body and all its systems. And then you can go in two ways: directly count calories or introduce indirect calorie restriction through diet and diet selection.

Direct calorie counting requires some skill and perseverance in the early stages, but for many people it works better than any weight loss diet. How to count calories? To do this, you need to know the mass of the product (after weighing it on an electronic food scale), know the calorie content of the product per 100 grams, and also have paper, a pen, a calculator and a few minutes of time on hand.

So, the process of weight loss is a change in the balance between incoming and expended energy. The most direct, simple way, accessible to everyone, is to limit the caloric content of food by counting calories, which, if the proper caloric content is observed, will guarantee the breakdown of fat, according to the law of conservation of energy. However, the direct calorie counting method has its drawbacks. Firstly, it does not report anything about satiety: for example, for the same figure of 1200 kcal daily you can be both very full and very hungry, it all depends on the diet, the included products 1200 kcal - that’s two bars of chocolate or five full-fledged ones meals from permitted, healthy foods. Secondly, with an incorrectly selected diet on a reduced calorie diet, weight will decrease, but this may be associated with health risks - for example, not only fat, but also muscle tissue may be lost if there is a deficiency of protein in the diet. And thirdly, you won’t count calories for the rest of your life; after losing weight, you need to develop other mechanisms and habits to maintain it. These and other reasons make caloric intake a necessary, but not the only tool in the weight loss process.

Formulas for counting calories

You can calculate your daily calorie intake for weight loss using the following two formulas.

The Harris-Benedict formula was developed and introduced to people in 1919 by famous scientists Francis Gano Benedict and James Arthur Harris. It has two varieties: for men and for women.

66 + [13.7 x weight (kg)] + [5 x height (cm)] - [6.76 x age (in years)] - for men;

655 + [9.6 x weight (kg)] + [1.8 x height (cm)] - [4.7 x age (in years)] - for women.

This calculation formula may be incorrect for modern residents of the metropolis, since the research was carried out at the beginning of the last century. This nuance should be taken into account when calculating the number of calories, especially for people whose body mass index exceeds the established norm.

The Mifflin-San Geor formula was developed much later - at the end of the last century, in the nineties. It is considered the most accurate and popular today.

Men - [9.99 x weight (kg)] + [6.25 x height (cm)] - [4.92 x age (years)] + 5;

Women - [9.99 x weight (kg)] + [6.25 x height (cm)] - [4.92 x age (years)] -161.

The formula takes into account the specifics of nutrition and other features of the modern world. However, it does not take into account the percentage of fat and muscle tissue.

Calorie counting algorithm for weight loss

The ability to correctly count calories consumed is the first step towards a healthy, beautiful body. This technique does not impose any restrictions on specific products. But, if you take into account your entire diet every day, it becomes clear that it is much better to eat a plate of meat salad than a small chocolate bar or some kind of confectionery product. Their calorie content is approximately the same, but their nutritional value is significantly different.

Calculating calorie intake is considered an effective way to lose weight and is included in many weight loss systems. This is explained by the following advantages:

• This method provides a reasonable approach to nutrition, without stress or serious restrictions. The body easily tolerates a new diet;
• the ability to calculate the number of calories consumed allows you to choose a complete diet rich in nutritional components, vitamins, minerals, which distinguishes this technique from various types of diets and fasting;
• Each person can independently determine how many calories they need to consume per day. For this purpose, there are special calorie calculator for weight loss online. This may be useful for those people who do not have the opportunity to contact competent specialists or a weight loss clinic due to the remoteness of settlements from urban centers, various material restrictions, and life circumstances;
• The calorie counter will allow you to calculate your diet for free, include your favorite dishes, and ensure compliance with the proportions of proteins, fats, and carbohydrates.

The calculation algorithm consists of three successive steps: calculating the basic metabolic rate, determining daily activity, calculating the final result. Let's take a closer look at each of them.

Step 1: Calculate your basal metabolic rate

To begin with, one of the most convenient formulas should be used to calculate the basic metabolic rate. Example: a woman 170 cm tall, weighing 75 kg, aged 36 years should consume no less than:

655+9.6×75+1.8×170-4.7×36=1512 kcal

This amount of energy will be enough to support life.

Step 2: Determine your daily activity

The resulting value of basal metabolism must be multiplied by the activity coefficient:

• 1.2 – low activity, complete absence of sports;
• 1.375 – sedentary lifestyle, light physical activity 1-2 times a week;
• 1.55 – average activity, sufficient load 2-4 times a week;
• 1.725 – active lifestyle, active work, training about 5 times a week;
• 1.9 – high activity, active work, daily active training.

Let's say a woman goes to fitness three times a week, then:

1512 kcal × 1.55 = 2344 kcal

This value is the required daily norm. This is how many calories you need to consume per day.

Step 3: Calculate the final result

To obtain the final result, you need to subtract 500-700 kcal from the resulting value - this is exactly how much you need to consume per day to lose weight.

2344 – 500(700) = 1844 (1644) kcal – this is exactly how much the body needs to start losing weight.

Practice shows that it is difficult to maintain the norm daily. Nutritionists suggest setting a minimum lower and maximum upper limit. This will help avoid breakdowns: if you really want something forbidden, you can eat it. But the next day, reduce the norm a little:

• upper limit: calorie norm + 100;
• lower limit: calorie norm – 200.

In addition, it is recommended to maintain the ratio of proteins, fats, carbohydrates:

• protein 10-25% of the daily diet;
• fats – 20-35%;
• carbohydrates – 45-65%.

These ratios may vary slightly depending on the specific goal: weight loss, weight gain, muscle growth.

Losing weight quickly and effectively at home is not difficult. Counting calories reduces restrictions and allows you to enter your favorite foods. The main thing is to conscientiously keep a diary, write down every product consumed, every sugar cube. But there is a special technique for weight loss, which is offered in weight loss clinics. It is based on an integrated approach, a combination of nutrition and psychology. This allows you to achieve optimal results and effective weight loss.

Calculation of calories using the Harris-Benedict formula

Content

Calculating calories using the Harris-Benedict formula will help determine the daily intake and burning of kcal. A calorie deficit is the basis for losing excess weight. To achieve it, it is necessary to monitor the parameters of the energy value of dishes, as well as the characteristics of physical activity. Read more about this payment system further in our article.

Calorie tables

The table of caloric content of foods will help in preparing your daily diet. It contains basic products, which, as a rule, are the basis of the diet. For all other products purchased in stores, the calorie content, protein, fat and carbohydrate content are indicated on the packaging.

Milk products

Bread and cereals

Vegetables and fruits

Dried fruits and beans

Meat

Sausages

Eggs

Fish and seafood

Sweets