The Body Mass Index (BMI) Calculator can be used to calculate BMI values based on their height and weight. BMI is a fairly reliable indicator of body fatness for most people.

Formula:

BMI = (weight) / (height * height)

Here's JavaScript code

 function BMI(weight, height) {
     return(weight / (height * height));
 }

 let bmiResult = BMI(57, 1.73736);
 console.log(bmiResult);