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BMI CalculationInstant calculation with height and weight
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Enter your height and weight to calculate your BMI instantly. WHO-standard weight status analysis, ideal weight range and healthy living recommendations.
BMI = Weight (kg) / Height (m)²Example: 75 kg, 175 cm → BMI = 75 / (1.75)² = 75 / 3.0625 = 24.49
| BMI Range | Category | Health Risk |
|---|---|---|
| < 16 | Severely Underweight | Serious health risk |
| 16 - 18.4 | Underweight | Low health risk |
| 18.5 - 24.9 | Normal | Lowest risk |
| 25 - 29.9 | Overweight | Increased health risk |
| 30 - 34.9 | Obese (Class I) | High risk |
| 35 - 39.9 | Obese (Class II) | Very high risk |
| ≥ 40 | Morbidly Obese | Extremely high risk |
BMI calculation formula and usage guide.
Enter your height in cm and weight in kg.
Your BMI value, category and ideal weight range are shown instantly.
See which WHO category you fall into.
BMI is calculated by dividing body weight by height squared. It indicates whether your weight is in the normal range.
BMI = Weight (kg) / [Height (m)]². Example: 70 kg, 1.70 m → BMI = 70 / 2.89 = 24.22.
According to WHO, normal BMI range is 18.5 to 24.9.
Multiply height squared (meters) by 18.5 and 24.9 to find ideal weight range.
No. Athletes with high muscle mass may have high BMI but not excess fat.
Yes. Children use age-based percentile values. This tool is for adults.
BMI is a general indicator based on height and weight. Body fat percentage requires special equipment.
Yes. Our BMI calculator is completely free.
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