Calculate your BMI using pounds and inches with our imperial units calculator.
Enter your weight in pounds and height in feet and inches
1 pound (lb) = 0.453592 kilograms (kg)
1 kilogram (kg) = 2.20462 pounds (lb)
1 foot (ft) = 0.3048 meters (m)
1 inch (in) = 2.54 centimeters (cm)
1 meter (m) = 3.28084 feet (ft)
BMI = (Weight in pounds × 703) ÷ (Height in inches)²
Step 1: Convert height to total inches (feet × 12 + inches)
Step 2: Square the height in inches
Step 3: Multiply weight by 703 and divide by squared height
Example: For a person weighing 154 lbs and 5'10" tall:
Height = (5 × 12) + 10 = 70 inches | BMI = (154 × 703) ÷ (70)² = 22.1
