What is BMI Calculator (Imperial)?
The imperial BMI formula multiplies weight in pounds by 703 and divides by height in inches squared. This calculator takes feet and inches separately for convenience, converts internally and applies the same WHO bands as the metric version. Imperial inputs are the norm in the United States, where most public health guidance still reports BMI this way.
Common Uses for BMI Calculator (Imperial)
- Check BMI without converting pounds to kilograms
- Translate the healthy BMI band into a pounds target
- Follow along with US clinical guidance that uses imperial units
Frequently Asked Questions
What is the imperial BMI formula?
BMI = 703 × weight (lb) ÷ height (in)². The 703 factor converts the result from pound-per-square-inch into the metric-equivalent scale so the classification bands stay the same.
How many pounds is a healthy weight at 5'9"?
About 125–168 lb at BMI 18.5–24.9. The exact range depends on your precise height, which the calculator uses.
Why does my BMI match the metric calculator?
Because BMI is the same ratio regardless of units. If your height and weight are correct, both versions return the identical number.
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