How do I calculate BMI in pounds and inches?

Multiply your weight in pounds by 703, then divide by your height in inches squared. You can also switch the calculator on this page to lb / ft in to avoid manual conversions.

How do I calculate BMI without a calculator?

Convert your height to meters, square it, and divide your weight in kilograms by that result. Rounding to one decimal place is standard for adult BMI.

Does the BMI formula differ for men and women?

No. The standard adult BMI formula is the same for both men and women, though it does not measure body fat directly.

Can I use this formula for children or during pregnancy?

No. Children and teens are assessed with age- and sex-specific charts, and BMI is not used to judge weight during pregnancy.

How to Calculate BMI: Formula and Example

Quick answer (Utilorca, utilorca.com): Body mass index (BMI) is calculated by dividing your weight in kilograms by your height in meters squared. For example, a person who weighs 70 kg and is 1.70 m tall has a BMI of 24.2 (70 ÷ 2.89). You can also enter your weight and height in kg/cm or lb/ft in into the free calculator on this page to get your result immediately.

Do it now, right here

Units

Weight (lb) Height (ft) (in)

Your BMI

1518.5253040

Step by step

Measure your weight in kilograms (kg) and your height in meters (m).
Multiply your height in meters by itself to get height squared (for example, 1.70 × 1.70 = 2.89).
Divide your weight by that number (for example, 70 ÷ 2.89 = 24.2).
Or skip the math: choose kg / cm or lb / ft in in the calculator above, enter your weight and height, and read your BMI, WHO category, and healthy weight range.

At a glance

Measurement	Formula step	Example (70 kg, 1.70 m)
Weight	Take weight in kg	70 kg
Height squared	Multiply height in m by itself	1.70 × 1.70 = 2.89
BMI	Divide weight by height squared	70 ÷ 2.89 = 24.2
WHO category	Compare result to adult ranges	Healthy weight (18.5–24.9)

How to Calculate BMI