Free BMI calculator online

Here’s our free online BMI calculator. It makes it easy task to calculate your Body Mass index! Just enter in your height and weight and press the calculate BMI button and you get the instant result. Calculates based on kg and lbs, just choose units you want to use.

Calculating your BMI / Body Mass Index is used for estimate the amount of body fat that you may have and determine if your are in healthy weight range. Body Mass Index is calculated using the formula BMI = (weight * 703) / height².

Instructions how to use free BMI calculator: Enter your weight and height below and press calculate.

Weight: Height: or cms
SI Units:
US Units:
UK Units:

Here’s what your BMI results indicate about your health:

BMI below 18.5 Underweight
BMI 18.5 – 24.9 Normal
BMI 25.0 – 29.9 Overweight
BMI 30.0 and Above Obese