Body Mass Index (BMI), is a combined measurement of your height and weight. BMI is not a perfect calculation, but usually when a person has a higher BMI, they also have a higher amount of body fat. Most insurance companies use this number to help determine if you'll be approved for weight-loss surgery.
BMI Calculator
var calculateBMI = function(debug)
{
//The imperial BMI formula = Weight (LBS) x 703 ÷ Height (Inches²)
var h = $('#heightFeet').val() * 12 + $('#heightInches').val() * 1;
var w = $('#weight').val() * 1;
var msg = '';
var classes = 'alert alert-danger';
if (debug) console.log('Height: ' + h + ', Weigth: ' + w);
if (h < 24 || h > 92) msg = 'Please enter a valid height.';
else if (w < 10) msg = 'Please enter a valid weight.';
else
{
msg = 'Your BMI is ' + Math.round((w * 703) / (h * h));
classes = 'alert alert-info';
}
$('#alertText').attr('class', classes).text(msg);
}
BMI Classifications
| BMI | Classification | Health Risk |
|---|---|---|
| Under 18.5 | Underweight | Minimal |
| 18.5 - 24.9 | Normal Weight | Minimal |
| 25 - 29.9 | Overweight | Increased |
| 30 - 34.9 | Obese | High |
| 35 - 39.9 | Severely Obese | Very High |
| 40 and Over | Morbidly Obese | Extremely High |
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