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Ketodiet CZ s.r.o.

BMI calculator will tell you the condition of your body

Q: What is BMI?

BMI or Body Mass Index represents the relation between body weight and height of a person.

Q: What is the formula for BMI calculation?

BMI is calculated as a person’s weight in kilograms divided by the second power of height in meters. The formula for BMI calculation = weight (kg) / (height in meters)².

Q: Is BMI dependent on age?

BMI values according to age are not relevant. The basic metric formula does not consider age or sex in adults. These factors play an important role only in children.

Q: What is ideal weight?

Ideal weight is identified by Body Mass Index or BMI value and more specified by waist and hip ratio index or WHR.

Q: What is WHR?

WHR is an abbreviation of waist–hip ratio. It is a ratio of waist and hip circumference. The formula for WHR calculation = waist circumference / hip circumference.

Q: What do I get by combining BMI and WHR?

If you complement BMI calculation with waist and hip ratio (WHR) you will get a more precise result and will be able to reveal the risk of obesity in a better way.

What is your optimum weight? Find it out with our BMI calculator. Just enter the data to calculate your BMI and you will have the result in no time. We will recommend you a suitable diet plan to fight your overweight. Get rid of your extra kilos.

Calculate yourBMI

You are

Man Woman

Age years

Height cm

Weight kg

For more accurate results please add:

Waist cm

Hips cm

BMI calculator may reveal health risks

BMI calculator is a simple tool that may do you a big favour. It will find out your BMI value. You will know if you have ideal body weight for your height. The values outside the optimum range might indicate health complications.

BMI table

Be aware of your BMI value thanks to easy-to-understand tables.

BMI	Type of overweight
< 18,4	underweight
18,5–24,9	ideal weight
25,0–29,9	overweight
30,0 ≤	obesity

Source: https://www.euro.who.int/en/health-topics/disease-prevention/nutrition/a-healthy-lifestyle/body-mass-index-bmi

What do BMI values mean?

BMI index value <18.5 = Underweight

It is a very low weight for your height. Value lower than 18.5 is a result of insufficient nutrition. Energetic and nutritional demands of your body are not in the right ratio. This can be caused by wrong energy coverage of your physical activities during the day. Beware of diseases that cause weight loss.

BMI index value 18.5 – 24.9 = Ideal weight

If you are in this range, you have ideal weight for your height. The risk of developing serious diseases due to overweight is low. However, the index value does not tell you what is the composition of your body. That is to say, how much fat versus active muscle mass you have. Therefore, it is better to enter your waist and hip circumference in the BMI calculator.

BMI index value 25 – 29.9 = Overweight

BMI values between 25 and 29.9 indicate overweight. It is usually called pre-obese condition. It is connected with slightly increased risk of developing associated diseases (diabetes mellitus, cardiovascular diseases, gall bladder diseases), and/or with developing obesity when following the principles of healthy diet regimen. The number of overweight people has been fast rising on a global scale.

BMI index value 30 – 34.9 = Class I obesity

A person with the value between 30.0 and 34.9 points can be regarded obese. With class I obesity the risk of some health complicationsincreases. It is, in particular, the risk of ischemic heart disease, high blood pressure, gout, cancer (breast, uterine, and colorectal), bearing joint arthritis.

BMI index value 35 – 39.9 = Class II obesity

Class II is diagnosed with the result of 35.0 to 39.9 points. You face higher risk of severe diseases compared to the previous category. Similarly as in the previous category it is necessary that you strive for losing weight and maintaining it for the long term.

BMI index value over 40 = Class III obesity

This class denominates obesity with the resulting value over 40.0 points. It is also known as morbid obesity. This category has the highest risks. Weight reduction is very difficult and surgery solution of bariatric procedure is usually chosen.

We often answer the question what is healthy weight. There is no official term or definition of “healthy weight”. However, with BMI values between 18.5 and 24.9 your body weight is in the range we call ideal weight in proportion to your height.

What will index BMI reveal about you?

Body mass index or BMI might guide you to set out ideal weight. It will reveal the ratio of your weight and height. However, BMI alone is not enough to get representative values.

Why is it better to enter also waist and hip circumference in the BMI calculator?

BMI calculation is only indicative. It can indicate whether you are underweight or overweight, or have optimum weight. But since it does not take into account other factors, you can’t follow it headlong. The composition of your body is decisive, i.e. how much fat and active muscle mass you have. Fat around waist and hips is an important indicator. Ratio of those values, or WHR index determines the visceral obesity. It is closely related to the visceral fat, in particular, visceral adipose tissue (VAT).

WHR – waist and hip circumference ratio – will reveal risk of obesity

Visceral adipose tissue (VAT)

Visceral adipose tissue is biochemically active. Its activity has a negative impact on the whole body. Its function is similar to endocrine glands but it releases harmful substances into the body.

These substances cause harm to the immune system and may cause chronic inflammations or cancer.
Excessive visceral fat slows down metabolism, which results in gaining weight.
Insulin receptors can be damaged as well, which can lead to insulin resistance. As a consequence, type 2 diabetes mellitus is developed.
Visceral fat also significantly contributes to increasing cholesterol levels. Its fat cells enter the blood more easily than the cells of subcutaneous fat.

A certain level of visceral fat is most easily determined by anthropometric measurements of waist circumference and waist/hip ratio. Men are more prone to accumulation of fat is this area.

Thanks to waist and hip circumference we can find out:

What type of figure you have
If you face the threat of visceral fat.
If you face health risks and what type (higher vulnerability to diseases of civilization such as high blood pressure, diabetes, atherosclerosis and heart attack).

Did you know?

According to the World Health Organisation people with apple body shape (significantly bigger belly circumference than hip circumference) are prone to higher health risks that people with pear body shape (wider hips than waist).

ABSI – A Body Shape Index

ABSI – A BODY SHAPE INDEX – is far more precise than the generally used BMI index. ABSI reflects also the waist circumference. It may also inform about the amount of VAT (visceral) fat in the body.

It can distinguish to which extent fat or muscles account for the body weight. Thanks to that, this index can determine the risk of obesity-associated diseases.

Formula for BMI calculation

Take a calculator at hand. You will calculate your BMI dividing your weight in kilograms by second power of height in meters. Do we talk like Einstein? Let’s look at a simple example below:

A woman aged 34 years is 164 cm tall and weighs 82 kg. The calculation of her BMI is the following:

BMI = 82 / 1,64² = 30,5

The BMI value of 30.5 shows the woman is overweight. We would recommend INTENSE diet plan.

BMI calculation in children according to their age

Age is an essential factor of BMI calculation in children and young people. Keep in mind that the recommended values from the calculator are not key in childhood age. There are exceptions even among adults over 18, where the body mass index value is sometimes in discrepancy with reality.

They are in particular strength athletes and pregnant women. Two people with the same BMI value may have a completely different shape of body.

If our BMI calculator tells you results you do not agree with, contact our nutrition advice centre. Together, you will go through the results of your BMI index and find out about potential pitfalls. We will be glad to advise you individually.

KetoDiet diet plans

We have prepared three simple diet plans for all of you who are trying to fight excess weight to help you follow the rule of eating regularly and guide you through the process of losing weight with protein diet from the start to the end.

Check out our diet plans

BMI – FAQs:

What is BMI?

BMI or Body Mass Index represents the relation between body weight and height of a person.

What is the formula for BMI calculation?

BMI is calculated as a person’s weight in kilograms divided by the second power of height in meters. The formula for BMI calculation = weight (kg) / (height in meters)².

Is BMI dependent on age?

BMI values according to age are not relevant. The basic metric formula does not consider age or sex in adults. These factors play an important role only in children.

What is ideal weight?