BMI Calculator
Calculate your Body Mass Index (BMI) online for free — metric or imperial units, WHO category and the healthy weight range for your height.
24.2
Healthy weight
A healthy BMI range (18.5–24.9) for your height is 53.5 kg – 72 kg. BMI is a screening measure, not a diagnosis — muscle mass, age and body composition matter too.
Frequently asked questions
- How is BMI calculated?
- Weight in kilograms divided by height in meters squared (kg/m²). The imperial formula multiplies lb/in² by 703 — this tool handles both.
- What is a healthy BMI?
- The WHO ranges are: under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30+ obesity. BMI is a screening tool, not a medical diagnosis.