BMI Calculator — Instantly Check Your Body-Mass Index

Calculate your BMI and get personalised weight-management tips.

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Weight (kg):

Height (cm):

What is BMI?

BMI (Body Mass Index) is a simple method used to estimate your body weight in relation to your height. BMI is one of the most common indicators for assessing whether your body weight is within normal limits or signals underweight, overweight or obesity.
BMI is calculated by dividing your weight in kilograms by the square of your height in metres.

For example, if someone weighs 70 kg and is 1.75 m tall, their BMI is calculated as: BMI = 70 / (1.75 × 1.75) = 22.86

What is a BMI calculator ?

A BMI calculator is a tool that helps you work out the ratio of your body weight to height and see whether you fall into a healthy weight range. Your BMI value (Body Mass Index) shows whether you are underweight, at a normal weight, overweight or obese.
Although BMI is not a perfect health indicator, it is used worldwide as a basic guide for monitoring body weight and can help you tailor your diet and lifestyle.

Clasification	BMI range
Severe malnutrition	< 16
Moderate malnutrition	16 - 17
Mild malnutrition	17 - 18.5
Normal weight	18.5 - 25
Excessive weight	25 - 30
Obesity grade I	30 - 35
Obesity grade II	35 - 40
Obesity grade II (extreme obesity)	> 40

Why it matters to track your BMI?

Tracking your BMI can help you better understand your own health and identify potential risks.

For example, people with overweight or obesity may be at increased risk of heart disease, type 2 diabetes, high blood pressure and other health problems.

Underweight also carries risks, such as a weak immune system, bone and muscle problems and lack of energy.

How to use our BMI calculator?

Using our BMI calculator is simple! Just enter your body weight in kilograms and height in metres, and the calculator will immediately work out your BMI. For more accurate results, enter your age and activity level as well.

Despite its limitations, BMI is a useful tool for about 90–95 % of the population.

Interesting facts about BMI

History of BMI

BMI was devised by Belgian mathematician Adolphe Quetelet back in 1832 to study the growth of the human population.

Alternative indicators

While BMI is widely used, other methods such as waist-to-height ratio, waist circumference and body-fat percentage can also help assess body weight.

Differences among populations

Research shows that certain populations have different cut-off values for risk compared with the European BMI standard.

Why is it important to keep a healthy BMI?

Overweight and underweight can affect your health in many ways. Below are some of the ways in which BMI can affect your body and what you can do about it.

Risks of overweight and obesity

People who are overweight have a higher risk of a range of health problems, including:

If your BMI indicates that you are overweight, you can take control and take small steps towards a healthier life.

Rizici pothranjenosti

If your BMI is below 18.5, your body may not be getting enough nutrients, which can lead to:

Maintaining a healthy body weight is essential for long-term health and vitality.

BMI is not a perfect measure – but it is a good indicator!

Although the BMI calculator provides a quick and simple insight into your weight, remember that it does not take muscle mass, body-fat percentage and other factors into account: