Enter your weight in pounds and height in feet and inches to calculate your BMI and see your WHO weight category. Runs entirely in your browser.
Pounds are converted to kilograms (multiply by 0.453592) and your feet plus inches are converted to metres (1 ft = 0.3048 m, 1 in = 0.0254 m). Those metric values then go through the WHO formula weight(kg) / height(m)^2 to produce a BMI on the same scale used worldwide, which is matched against the WHO weight categories for the label that appears below your result.
All calculations happen locally in your browser tab. Our servers are not involved at any point.
The BMI formula was standardised by the WHO Technical Report Series 894 (2000): BMI = weight(kg) / height(m)². WHO classifies BMI into four categories for adults: Underweight (<18.5), Normal weight (18.5–24.9), Overweight (25.0–29.9), and Obese (≥30.0). BMI does not distinguish between muscle and fat mass and is intended as a population-level screening tool, not an individual diagnostic.
To estimate daily energy needs, try the calorie calculator. For body composition with circumference measurements, use the body fat calculator. To find a reference weight range for your height, see the ideal weight calculator.