BMI Calculator (lbs and inches)
A BMI calculator using pounds and inches provides accurate body mass index calculations using imperial measurements commonly used in the United States. Use our free imperial BMI calculator to assess your weight status with familiar lbs and inches measurements. This tool eliminates metric conversion errors and provides instant BMI results based on the standard imperial formula. Calculate your BMI using pounds and inches for consistent health tracking with US customary units.
Free • Imperial units • Instant results
How Imperial BMI Calculation Works
Imperial BMI Formula
BMI = (Weight (lbs) / Height (inches)²) × 703
Conversion Factor: 703 converts imperial units to standard BMI
Underweight: BMI < 18.5
Normal Weight: BMI 18.5 - 24.9
Overweight: BMI 25.0 - 29.9
Obese: BMI ≥ 30.0
Example Imperial BMI Calculation
A person weighing 150 lbs at 5'6" (66 inches) has a BMI of 24.2, placing them in the normal weight category. This calculation uses the imperial formula: (150 ÷ 66²) × 703 = 24.2.
Imperial measurements provide familiar units for US users without metric conversions.
Benefits of Imperial BMI Calculation
Frequently Asked Questions
How do I calculate BMI with lbs and inches?
Use the formula: BMI = (Weight in lbs ÷ Height in inches²) × 703. For example: (150 ÷ 66²) × 703 = 24.2 BMI.
Why is there a 703 conversion factor?
The 703 factor converts imperial units (lbs/inches²) to the standard BMI scale, making results consistent with metric calculations.
Is BMI the same for imperial and metric?
Yes, BMI results are identical regardless of units. Imperial calculations use the 703 conversion factor to match metric results.
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