How to calculate your BMI

BMI is a simple calculation that uses your height and weight to estimate your body fat.  Remember that it is an estimate, it is not accurate in some cases and it does not diagnose health.

To calculate it in metric units, divide your weight in kilograms (kg) by your height in meters (m) squared.

For example, if you weigh 70 kg and are 1.75 m tall: 70 ÷ (1.75 × 1.75) = 22.9

To calculate it in imperial units, divide your weight in pounds (lbs) by your height in inches (in) squared, and multiply the result by 703.

For example, if you weigh 154 lbs and are 5’9" (69 inches) tall:154 ÷ (69 × 69) × 703 = 22.7

But, no need to do the math yourself. Our calculator gives you a result in seconds.