How do I calculate BMI from kg and cm?

Divide your weight in kg by your height in meters squared. First convert cm to meters (divide by 100), then square it, then divide your weight by that number. Example: 80 kg, 180 cm = 80 / (1.8^2) = 80 / 3.24 = 24.7.

What BMI is considered healthy?

A BMI between 18.5 and 24.9 is considered healthy weight by the WHO. This range is associated with the lowest risk of chronic disease and mortality at a population level.

Is 25 BMI overweight?

A BMI of exactly 25.0 is the threshold for overweight. The overweight range extends from 25.0 to 29.9. However, being right at 25.0 is very close to normal and may not be clinically significant — context (muscle mass, waist circumference, overall health) matters.

BMI Calculator

The simplest way to check your BMI: enter weight in kilograms and height in centimeters. Used by healthcare providers worldwide, the metric formula (weight / height-in-meters squared) gives you a number that maps directly to WHO health categories. Results include a visual gauge, category badge, and your healthy weight range.

BMI Calculator

Enter your height and weight to calculate your Body Mass Index.

Height

Weight

BMI Categories

WHO classification of Body Mass Index ranges.

Category	BMI Range	Status
Underweight	< 18.5	May indicate nutritional deficiency
Normal	18.5 – 24.9	Lowest health risk
Overweight	25 – 29.9	Moderate increased risk
Obese I	30 – 34.9	High risk
Obese II	35 – 39.9	Very high risk
Obese III	40+	Extremely high risk

Frequently Asked Questions

How do I calculate BMI from kg and cm?: Divide your weight in kg by your height in meters squared. First convert cm to meters (divide by 100), then square it, then divide your weight by that number. Example: 80 kg, 180 cm = 80 / (1.8^2) = 80 / 3.24 = 24.7.
What BMI is considered healthy?: A BMI between 18.5 and 24.9 is considered healthy weight by the WHO. This range is associated with the lowest risk of chronic disease and mortality at a population level.
Is 25 BMI overweight?: A BMI of exactly 25.0 is the threshold for overweight. The overweight range extends from 25.0 to 29.9. However, being right at 25.0 is very close to normal and may not be clinically significant — context (muscle mass, waist circumference, overall health) matters.

Medical disclaimer: BMI is a screening tool, not a medical diagnosis. It does not measure body fat directly and does not account for muscle mass, bone density, age, sex, or ethnicity. Consult a healthcare provider for personalized health advice.

BMI Calculator

BMI Calculator

BMI Categories

Frequently Asked Questions

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