BMI Calculator — Body Mass Index for Adults
Quickly compute your BMI and see whether you fall in the underweight, healthy, overweight, or obese range.
- Healthy weight range
- 53.5 kg – 66.5 kg
- Scale used
- Asian / Malaysian (≥23 overweight, ≥27.5 obese)
About this calculator
Body Mass Index (BMI) is a simple ratio of weight to height, used as a population-level screening tool for body-fat related health risk. The standard formula is weight (kg) divided by height (m) squared. WHO classifies BMI as: under 18.5 = underweight, 18.5–24.9 = healthy, 25–29.9 = overweight, 30+ = obese. For Asian populations (including Malaysians), the Ministry of Health and WHO Asia-Pacific guidelines suggest a stricter overweight cutoff of 23.0 and obese cutoff of 27.5, because cardiometabolic risk rises at lower BMI values among East and Southeast Asians. BMI does not distinguish between fat and muscle mass, so very muscular individuals (athletes, bodybuilders) may register as overweight despite low body fat. Pair BMI with waist circumference, body fat percentage, and physical activity for a more complete picture.
Formula
BMI = weight (kg) ÷ height (m)²
Example calculation
Example: 170 cm, 70 kg, Asian scale
BMI = 70 ÷ (1.7 × 1.7) = 24.2. On the Asian scale, this is just above the 23 overweight cutoff — though it would be 'healthy' under the standard WHO scale.