Calculator

BMI Calculator in lbs and inches.

A free Body Mass Index calculator for people who weigh in pounds and report their height in inches. Enter your lb weight and inch height and see your BMI, WHO category, body fat percentage, healthy weight range, ideal weight and daily calorie maintenance instantly.

Underweight < 18.5

Normal 18.5 – 24.9

Overweight 25 – 29.9

Obese ≥ 30

Why a lb + inches form

The lb + inches form is the most "American" input: weight on a bathroom scale in pounds, height on a driver's licence in inches. The formula uses the imperial conversion factor BMI = 703 × weight (lb) / height (in)², which produces the same number as the metric formula after unit conversion.

How the calculation works

For a 165 lb person who is 69 inches tall (5 ft 9 in), BMI = (703 × 165) ÷ (69 × 69) = 115,995 ÷ 4,761 = 24.4 — the same number as 75 kg ÷ (1.75 m)². The calculator does the conversion for you; you just type in lb and inches.

Switching to other unit forms

You can switch to lb/ft+in, kg/cm or kg+ft/in at any time. Your current values are carried across the swap, so a 165 lb, 69 in reading becomes a 75 kg, 175 cm reading in one click.

Next steps

Other unit variants

BMI calculators with other unit defaults.

Every BMI calculator on this site uses the same WHO/CDC math under the hood. Pick the variant that matches your situation — sex, age group, population cutoffs, or unit default.

Imperial

Imperial BMI

Full imperial default — weight in lb, height in feet + inches. Useful if you report your height in feet and inches rather than just inches.

Metric

BMI in kg and cm

Full metric default — weight in kg, height in cm.

Mixed units

BMI in kg and feet

Mixed-unit default — weight in kg, height in feet + inches. Useful if your scale is metric but your height is in feet.

Metric

Metric BMI

Canonical metric page — same kg + cm default with a longer intro about the metric system.