Best for
- Quick health check-ins
- Tracking weight goals
- Comparing metric and imperial measurements
Privacy
Your measurements are processed entirely in your browser. Nothing is stored or sent to a server.
Quick tips
- BMI is a general screening tool and does not account for muscle mass, so athletes may read higher than expected.
- The healthy BMI range for most adults is 18.5 to 24.9.
How to use this tool
- Choose metric (kg/cm) or imperial (lb/ft+in).
- Enter your weight and height.
- Read your BMI, weight category, and the healthy weight range for your height.
Common questions
How is BMI calculated?
BMI is your weight in kilograms divided by the square of your height in metres (kg/m²). Imperial inputs are converted to metric before the calculation.
Is BMI accurate for everyone?
BMI is a quick estimate, not a diagnosis. It does not distinguish muscle from fat and is less reliable for athletes, children, and the elderly.