Weigh yourself in kilograms or pounds
Measure your height in meters or inches
Use the formula: BMI = weight in kg / height in m²
Or use the formula: BMI = (weight in lb / height in in²) × 703
Square your height before dividing
Compare the result to BMI categories:
Underweight: below 18.5
Normal weight: 18.5 to 24.9
Overweight: 25.0 to 29.9
Obesity: 30.0 and above