BMI Calculator
How to use this page
- Fill in the fields in the form above — the result recomputes at once, with no page reload.
- Under the result you will find the interpretation scale, if the calculator has one: it says which range your value fell into.
- The formula we use is shown lower on this page — you can check the arithmetic yourself.
- To compute the same for another game or variant, change it in the select field — prices and pools update automatically.
What this page does not do: It does not point to numbers to play and does not predict a draw — every draw is independent of the previous ones.
Further reading
Interpretation scale
| Range | Description |
|---|---|
| below 16 | starvation ← your result |
| 16 – 17 | emaciation ← your result |
| 17 – 18.5 | underweight ← your result |
| 18.5 – 25 | normal weight ← your result |
| 25 – 30 | overweight ← your result |
| 30 – 35 | obesity class I ← your result |
| 35 – 40 | obesity class II ← your result |
| 40 and above | obesity class III ← your result |
BMI, or body mass index, is the quickest way to compare body weight with height. It's computed by dividing weight in kilograms by height in meters squared. A person with a weight of 70 kg and a height of 175 cm has a BMI equal to 70 / (1.75 × 1.75), or about 22.9. The whole strength of this indicator lies in the fact that no equipment beyond a scale is required to calculate it. The World Health Organization has used it for decades precisely because it allows entire populations to be compared without costly testing.
Just as important is what BMI doesn't measure: BMI doesn't distinguish muscle from fat. A bodybuilder weighing 100 kg at 180 cm height comes out with a BMI of 30.9, formally in the obesity range, even though his body fat percentage might be around 8 percent. The opposite situation happens just as often: a person with little muscle mass can have a normal BMI while carrying a high proportion of fat. The formula also ignores the distribution of body fat, and it's precisely abdominal fat that carries the greatest metabolic risk. That's exactly why it's worth calculating WHR or WHtR alongside BMI — these indicators look at waist circumference and tell you something different.
BMI also makes no sense for children and teenagers under 18 — growth charts accounting for age and sex are used instead. Pregnancy is another excluded case, for older people with sarcopenia, and for strength-sport athletes. Treat the number as a signal, not a diagnosis: if it falls within the 18.5–24.9 range, there's probably no cause for concern. If it comes out below 16 or above 35, discuss the result with a doctor — such values deserve a look from someone who can examine you in person.
Frequently asked questions
What is a healthy BMI?
According to the World Health Organization's classification, a normal body weight corresponds to a BMI of 18.5 to 24.9 kg/m². A value below 18.5 indicates underweight, and 25.0 or above indicates overweight. The range 25.0–29.9 is overweight, and obesity begins at 30.0.
How do I calculate BMI by hand?
Divide your body weight in kilograms by your height in meters squared. For 68 kg and 172 cm, the calculation looks like this: 68 / (1.72 × 1.72) = 68 / 2.9584 = 23.0. The most common mistake is entering height in centimeters instead of meters.
Is BMI reliable for people who do strength training?
No, and this is a well-known limitation. Muscle weighs more than fat at the same volume, so a person with a large amount of muscle mass can have a BMI above 30 with a body fat percentage of around 10 percent. In such a case, it's better to check waist circumference or perform a body composition measurement.
From what BMI is obesity diagnosed?
Obesity begins at a BMI of 30.0 kg/m². It's divided into three classes: class I is 30.0–34.9, class II is 35.0–39.9, and class III, known as morbid obesity, covers values of 40.0 and above. If your result is above 35, consult a doctor.
See also
Broca Formula Ideal Weight Calculator
Calculate your ideal body weight using the Broca formula based on height and sex. Learn the history of this 18
Harris-Benedict BMR Calculator
Calculate your basal metabolic rate using the Harris-Benedict equation. Enter weight, height, age and gender t
Lorentz Ideal Body Weight Calculator
Calculate ideal body weight using the Lorentz formula based on height and sex. See how it differs from the Bro