Calculate your Body Mass Index (BMI) from height and weight. Get weight classification based on WHO and Chinese national standards, plus your ideal weight range.
BMI (Body Mass Index) is a simple ratio of weight to height squared. It is a useful screening tool but does not measure body fat directly — it can misclassify muscular or elderly individuals.
WHO standard: 18.5–24.9 is normal. Chinese national standard (NHC): 18.5–23.9 is normal weight; 24–27.9 is overweight; ≥28 is obese.
No. All calculations run entirely in your browser. No health data is collected or transmitted.
BMI does not distinguish between fat and muscle — muscular athletes may be incorrectly classified as overweight. It also ignores fat distribution (waist circumference is a better cardiovascular predictor), age, sex, and ethnicity. BMI is a population-level statistical tool, not a precise personal health measure. Consult a doctor and use additional metrics like waist circumference and body fat percentage for a complete picture.