BMI Calculator Calcly Body Mass Index (BMI) Calculator Weight unit: kg st/lb Height unit: cm ft/in Weight (kg) Weight (st + lb) st lb Height (cm) Height (ft + in) ft in Gender Male Female Calculate Share Your BMI— Category— Target Weight Range— <18.5 18.5–24.9 25–29.9 30+ ⚠️ BMI is only one health indicator and does not account for muscle or bone density. If you’re concerned about your results, speak with your GP.