Adult Body Mass Tool

Don’t just trust your scale to tell you if you are at a healthy weight. This tool finds your body mass index (BMI). This uses your weight and height to assess how much of your body is likely fat. A higher BMI means more risk for health problems linked to weight. The BMI goal for most people is a score between 18 and 25.

How tall are you? What do you weigh? Height: feet inches Weight: lbs. Your Score Your score is . Your score means that you are underweight.

Your score is . Your score is between 18.5 and 25. This is where you want to be. Exercise, eat healthy food, and get enough sleep to stay healthy.

Your score is . Your score says you are overweight. A high BMI can put you at risk for chronic diseases. These include high blood pressure, high blood cholesterol, type 2 diabetes, and gallbladder disease. You can make lifestyle changes to lower your BMI. It’s important for you to try to lose weight. Make sure to get exercise. Eat healthy food. And get enough sleep.

Your score is . Your BMI suggests that you are obese*. A high BMI can put you at risk for chronic diseases. These include high blood pressure, high blood cholesterol, type 2 diabetes, and gallbladder disease. You can make lifestyle changes to lower your BMI. It’s important for you to try to lose weight. Try to get more exercise. Eat healthy food. And get enough sleep.

You are underweight if you weigh pounds or less. This means your BMI is less than 18.5. You are in good shape if you weigh pounds. This means your BMI is 18.5 to 24.9. You are overweight if you weigh pounds. This means your BMI is 25 to 29.9. You are obese if you weigh pounds or more. This means your BMI is 30 or higher. You are morbidly obese if your BMI is over 40. <!-- /////////////////////////////////////////////////////////////////////////////////////////////////////////// // Values global to this calculator ///////////////////////////////////////////////////////////////////////////////////////////////////////////

var m_ThisCalculatorsName = "BMICalculator"; var m_CurrentQueryString = location.search.substring(1); var m_PreCalculationQueryString = GetPreCalculationQueryString(); var m_ExpectedNumberOfParameters = 3; var m_Parameters = []; // this will be initialized if and when appropriate values are present in the query string

// this code runs whenever the page loads //check to see if there's something in the querystring, if so, parse it. if(m_CurrentQueryString.length > 0) { BMICalculator_ParseQueryString(); // run the calculator if values are present for it to work on if(m_Parameters.length == m_ExpectedNumberOfParameters) { // run the calculation code BMICalculator_Calculate();

// persist the textbox value the user entered in for their weight BMICalculator_PrePopulateCalculator(); } }

/////////////////////////////////////////////////////////////////////////////////////////////////////////// // Button on-click handlers ///////////////////////////////////////////////////////////////////////////////////////////////////////////

function BMICalculator_Submit() { if(BMICalculator_Validate() == true) { // assemble query string to be used for calculation work BMICalculator_CreateQuerystring(); } }

function BMICalculator_Reset() { window.location.href = location.pathname + ((m_PreCalculationQueryString.length > 0) ? ("?" + m_PreCalculationQueryString) : ""); }

/////////////////////////////////////////////////////////////////////////////////////////////////////////// // Query string-related functions ///////////////////////////////////////////////////////////////////////////////////////////////////////////

function GetPreCalculationQueryString() { m_PreCalculationQueryString = ""; var tmpArray = m_CurrentQueryString.split("&"); //get the paired querysting parameters. // look for and retain all query string values extant prior to calculator being used for(x = 0; x 0) ? (m_PreCalculationQueryString.substring(0, m_PreCalculationQueryString.length-1)) : ""; }

function BMICalculator_PrePopulateCalculator() { var elemWeight = document.getElementById(m_ThisCalculatorsName + "_Weight"); elemWeight.value = m_Parameters[0]; // m_Parameters[0] = weight entered by user var elemHeightFeet = document.getElementById(m_ThisCalculatorsName + "_Height_Feet"); elemHeightFeet.value = m_Parameters[1]; // m_Parameters[1] = height in feet entered by user var elemHeightInches = document.getElementById(m_ThisCalculatorsName + "_Height_Inches"); elemHeightInches.value = m_Parameters[2]; // m_Parameters[2] = height in inches entered by user }

/////////////////////////////////////////////////////////////////////////////////////////////////////////// // Validation Functions ///////////////////////////////////////////////////////////////////////////////////////////////////////////

function BMICalculator_IsNumeric(sText) { var rxNumber = new RegExp("^[\\d\\.]+$", "g"); return (rxNumber.exec(sText) != null); }

function BMICalculator_Validate() { var strError = "The following errors occured while validating your information:\r"; var isError = false;

//check the height_feet var elemHeightFt = document.getElementById(m_ThisCalculatorsName + "_Height_Feet"); if(elemHeightFt.value == "") { strError += " - Height: Feet is required\r"; isError = true; } else { if(!BMICalculator_IsNumeric(elemHeightFt.value)) { strError += " - Height: Feet is not a valid number\r"; isError = true; } }

//check the height_ inches var elemHeightIn = document.getElementById(m_ThisCalculatorsName + "_Height_Inches"); if(elemHeightIn.value == "") { strError += " - Height: Inches is required\r"; isError = true; } else { if(!BMICalculator_IsNumeric(elemHeightIn.value)) { strError += " - Height: Inches is not a valid number\r"; isError = true; } else { if(elemHeightIn.value > 11) { strError += " - Height: Inches must be less than 12\r" } } }

//check the weight var elemWeight = document.getElementById(m_ThisCalculatorsName + "_Weight"); if(elemWeight.value == "") { strError += " - Weight is required\r"; isError = true; } else { if(!BMICalculator_IsNumeric(elemWeight.value)) { strError += " - Weight is not a valid number\r"; isError = true; } }

//if there was an error, display alert, and return to form. if(isError) { alert(strError); return false; } else { return true; } }

/////////////////////////////////////////////////////////////////////////////////////////////////////////// // Main calculator code ///////////////////////////////////////////////////////////////////////////////////////////////////////////

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Adult Body Mass Tool

How tall are you? What do you weigh?

Your Score

Lambert, J.G. M.D.

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