Enter your details and click "Calculate Body Type" to see your estimated somatotype.
function calculateBodyType() {
var heightValue = parseFloat(document.getElementById("heightValue").value);
var heightUnit = document.getElementById("heightUnit").value;
var weightValue = parseFloat(document.getElementById("weightValue").value);
var weightUnit = document.getElementById("weightUnit").value;
var wristValue = parseFloat(document.getElementById("wristValue").value);
var wristUnit = document.getElementById("wristUnit").value;
var gender = document.getElementById("gender").value;
var resultDiv = document.getElementById("bodyTypeResult");
// Input Validation
if (isNaN(heightValue) || heightValue <= 0 ||
isNaN(weightValue) || weightValue <= 0 ||
isNaN(wristValue) || wristValue <= 0) {
resultDiv.innerHTML = "
Please enter valid positive numbers for all fields.
";
return;
}
// Convert all to metric for internal calculation
var heightCm = heightValue;
if (heightUnit === "inches") {
heightCm = heightValue * 2.54;
}
var weightKg = weightValue;
if (weightUnit === "lbs") {
weightKg = weightValue * 0.453592;
}
var wristCm = wristValue;
if (wristUnit === "inches") {
wristCm = wristValue * 2.54;
}
// Calculate BMI
var heightM = heightCm / 100;
var bmi = weightKg / (heightM * heightM);
// Determine Frame Size (using height/wrist ratio)
var frameRatio = heightCm / wristCm;
var frameSize = "";
if (gender === "female") {
if (frameRatio > 10.9) {
frameSize = "Small";
} else if (frameRatio >= 9.9 && frameRatio <= 10.9) {
frameSize = "Medium";
} else { // frameRatio 10.4) {
frameSize = "Small";
} else if (frameRatio >= 9.6 && frameRatio <= 10.4) {
frameSize = "Medium";
} else { // frameRatio < 9.6
frameSize = "Large";
}
}
// Determine BMI Category
var bmiCategory = "";
if (bmi = 18.5 && bmi = 25 && bmi < 30) {
bmiCategory = "Overweight";
} else {
bmiCategory = "Obese";
}
var resultText = "";
var primaryBodyType = "";
var finalDescription = "";
// Primary classification based on frame size and general build
if (frameSize === "Small") {
if (bmi = 20 && bmi = 18.5 && bmi < 25) { // Normal BMI, medium frame
primaryBodyType = "Mesomorph";
finalDescription = "You likely have a **Mesomorphic** body type. This means you tend to have a naturally athletic and muscular build, with a medium frame. You typically gain muscle and lose fat relatively easily.";
} else if (bmi = 25) { // Overweight/Obese, large frame
primaryBodyType = "Endomorph";
finalDescription = "You likely have an **Endomorphic** body type. This means you tend to have a larger, more rounded physique with a higher body fat percentage and a large frame. You may find it harder to lose weight and build muscle, but you often possess great strength.";
} else if (bmi >= 18.5 && bmi < 25) { // Normal BMI, large frame
primaryBodyType = "Endo-Mesomorph";
finalDescription = "You show tendencies of an **Endo-Mesomorph**. You have a solid, strong build with a large frame, but your BMI is currently in the healthy range. You can build muscle but need consistent effort to maintain leanness and manage fat storage.";
} else { // Underweight, large frame (less common)
primaryBodyType = "Mixed (Large Frame, Lower BMI)";
finalDescription = "Your large frame combined with a lower BMI suggests a unique combination. While your bone structure is robust, you are currently lean. Focus on building lean muscle to complement your frame.";
}
}
resultText += "Your Estimated Body Type: " + primaryBodyType + "";
resultText += "Details:";
resultText += "Your BMI: " + bmi.toFixed(1) + " (" + bmiCategory + ")";
resultText += "Your estimated frame size: " + frameSize + "";
resultText += finalDescription;
resultDiv.innerHTML = resultText;
}
Understanding Your Body Type: The Somatotype System
Have you ever wondered why some people seem to effortlessly stay lean, while others build muscle quickly, and some struggle with weight gain despite their best efforts? Part of the answer lies in understanding body types, often referred to as somatotypes. Developed by psychologist William Sheldon in the 1940s, the somatotype system categorizes human physiques into three primary types: Ectomorph, Mesomorph, and Endomorph.
The Three Primary Body Types:
1. Ectomorph
Ectomorphs are typically characterized by a lean, delicate build with a small bone structure. They often have long limbs, narrow shoulders, and a fast metabolism, making it challenging for them to gain weight or muscle mass. While they may appear thin, they can sometimes have a higher body fat percentage than expected if they don't engage in strength training.
Physical Traits: Lean, thin, delicate bone structure, narrow shoulders and hips, long limbs, small joints.
Metabolism: Fast, burns calories quickly.
Muscle & Fat: Difficulty gaining muscle and fat.
Fitness Approach: Focus on strength training to build muscle, consume adequate calories and protein.
Example: A female, 170 cm tall, weighing 55 kg, with a wrist circumference of 14 cm. Her BMI would be around 19.0, and her frame size would likely be small, indicating an Ectomorphic tendency.
2. Mesomorph
Mesomorphs are considered the "athletic" body type. They possess a naturally muscular build, a medium to large bone structure, and broad shoulders. They tend to gain muscle and lose fat relatively easily, making them well-suited for many sports and bodybuilding. Their metabolism is typically efficient.
Physical Traits: Athletic, muscular, strong, medium to large bone structure, broad shoulders, narrow waist.
Metabolism: Efficient, can gain/lose weight with relative ease.
Muscle & Fat: Gains muscle easily, can lose fat effectively.
Fitness Approach: Responds well to both strength training and cardiovascular exercise. Balanced diet is key.
Example: A male, 180 cm tall, weighing 80 kg, with a wrist circumference of 18 cm. His BMI would be around 24.7, and his frame size would likely be medium, indicating a Mesomorphic tendency.
3. Endomorph
Endomorphs typically have a larger, more rounded physique with a tendency to store body fat. They often have a larger bone structure, wider hips, and a slower metabolism, which can make weight loss more challenging. Despite this, endomorphs often possess great strength and can build muscle effectively with consistent effort.
Physical Traits: Rounded, softer physique, larger bone structure, wider hips, shorter limbs, often stocky.
Metabolism: Slower, tends to store fat easily.
Muscle & Fat: Gains muscle and fat easily, finds it harder to lose fat.
Fitness Approach: Requires consistent cardiovascular exercise and strength training, with a strict focus on diet and portion control.
Example: A female, 160 cm tall, weighing 75 kg, with a wrist circumference of 16 cm. Her BMI would be around 29.3, and her frame size would likely be medium to large, indicating an Endomorphic tendency.
How the Calculator Works
Our Body Type Calculator uses a simplified approach to estimate your somatotype based on key anthropometric measurements:
Height and Weight: These are used to calculate your Body Mass Index (BMI), a general indicator of body fatness.
Wrist Circumference: This measurement, in relation to your height and gender, helps determine your bone structure or "frame size" (small, medium, or large). Bone structure is a significant factor in somatotyping.
Gender: Biological differences between males and females influence the interpretation of frame size ratios.
By combining your BMI and estimated frame size, the calculator provides an assessment of your primary body type, along with a brief description of its characteristics.
Important Considerations
It's crucial to remember that the somatotype system is a generalization. Most individuals are not "pure" ectomorphs, mesomorphs, or endomorphs, but rather a combination of two or even all three, with one type being dominant. This calculator provides an estimation and should not be taken as a definitive medical diagnosis. Factors like diet, exercise, age, and genetics can significantly influence your body composition and how your body type manifests over time.
Understanding your general body type can be a useful tool for tailoring your fitness and nutrition strategies to better suit your natural predispositions, helping you achieve your health and fitness goals more effectively.