Find your healthy weight range for your height from the normal BMI band.
The WHO healthy weight range is defined by the 'normal' BMI band of 18.5–24.9 kg/m². By fixing BMI at each endpoint and solving for weight, we get the minimum and maximum weight that keeps you in the normal category for your height. The mid-range target of BMI 21.7 sits at the centre of the band.
Healthy weight from BMI
Weight (kg) = BMI × height² (m²)
This tool provides estimates based on the WHO BMI standard and is not a substitute for clinical assessment. BMI does not measure body fat directly and may misclassify muscular individuals or those with low muscle mass.
The 18.5–24.9 range is calibrated to white European populations. Many Asian health bodies use a lower threshold of 23 for overweight and 27.5 for obesity, because metabolic risk appears higher at lower BMIs in Asian populations. Athletes may fall outside the healthy range due to muscle mass.
Both ends of the healthy range are healthy. Someone with a large frame naturally sits toward the upper end of normal; a smaller-framed person toward the lower. If your weight is within the range and your waist circumference and metabolic markers are normal, you are not at elevated risk.
Sustainable fat loss is 0.5–1 kg/week (equivalent to a 500–1000 kcal/day deficit). Setting a timeline based on this rate makes goals achievable. Faster losses typically include significant lean mass loss.