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Somatotype Calculator

Calculate your Endomorphy, Mesomorphy and Ectomorphy scores using the anthropometric Heath-Carter somatotype method.

1

Height

ft
in
cm
2

Body weight

lb
kg
Skinfold measurements
3

Triceps skinfold

mm
Measured with a skinfold caliper.
4

Subscapular skinfold

mm
Measured below the shoulder blade.
5

Supraspinale skinfold

mm
Measured at the standard supraspinale site.
6

Calf skinfold

mm
Used to correct the calf girth measurement.
Girth measurements
7

Flexed arm girth

in
cm
Measure with the arm flexed and the biceps contracted.
8

Maximum calf girth

in
cm
Measure around the widest part of the calf.
Bone breadth measurements
9

Humerus breadth

in
cm
Biepicondylar breadth of the humerus.
10

Femur breadth

in
cm
Biepicondylar breadth of the femur.

Your Somatotype Result

Heath-Carter anthropometric rating

0.0
Endomorphy
0.0
Mesomorphy
0.0
Ectomorphy
Somatotype rating
3.0 - 4.0 - 3.0
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Results are for informational and educational purposes only and are not medical or healthcare advice. Somatotype measurements can vary with measurement technique and should not be treated as a diagnosis.
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How the Somatotype Calculator Works

The calculator uses the Heath-Carter anthropometric somatotype method. Unlike simplified body-type quizzes, this approach uses measured skinfolds, body girths, bone breadths, height and body weight to calculate three separate physique components.

Component What it represents Main measurements used
Endomorphy The relative adiposity component of the somatotype rating. Triceps, subscapular and supraspinale skinfolds, corrected for height.
Mesomorphy The relative musculoskeletal robustness component. Humerus breadth, femur breadth, corrected arm girth and corrected calf girth.
Ectomorphy The relative linearity or slenderness component. Height-to-weight ratio.

The calculation method

Endomorphy is calculated from the height-corrected sum of the triceps, subscapular and supraspinale skinfolds.

X = (triceps + subscapular + supraspinale) × (170.18 / height in cm) Endomorphy = -0.7182 + 0.1451X - 0.00068X² + 0.0000014X³

Mesomorphy combines skeletal breadths with corrected arm and calf girths.

Mesomorphy = 0.858(HB) + 0.601(FB) + 0.188(CAG) + 0.161(CCG) - 0.131(height) + 4.5 CAG = arm girth - triceps skinfold / 10 CCG = calf girth - calf skinfold / 10

Ectomorphy is calculated from the height-to-weight ratio.

HWR = height / cube root of body weight If HWR ≥ 40.75: Ectomorphy = 0.732 × HWR - 28.58 If 38.25 < HWR < 40.75: Ectomorphy = 0.463 × HWR - 17.63 If HWR ≤ 38.25: Ectomorphy = 0.1
Important: The three scores are reported in the fixed order Endomorphy - Mesomorphy - Ectomorphy. A somatotype describes measured physique characteristics at a particular point in time. It is not a permanent label, a prediction of your potential, or a medical classification.
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Fitness Calculators
Somatotype Calculator

Somatotype Calculator uses the Heath-Carter anthropometric method to calculate your Endomorphy, Mesomorphy and Ectomorphy scores. Enter your height, weight, skinfolds, body girths and bone breadths to get a three-number somatotype rating. The result describes your measured physique characteristics at the time of assessment, rather than assigning a permanent body type. Use the calculator to better understand what the traditional endomorph, mesomorph and ectomorph terms actually mean.

Medical Disclaimer: The calculator results and information provided in this article are for educational and informational purposes only and do not constitute medical, health, or professional advice. Always consult with a qualified healthcare provider before making any decisions related to your health, diet, or fitness goals. Individual results may vary, and this tool should not be used to diagnose or treat any medical condition.

What is a somatotype and what do endomorph, mesomorph and ectomorph mean?

A somatotype is a three-component description of physique based on endomorphy, mesomorphy and ectomorphy. Endomorphy relates mainly to relative adiposity, mesomorphy to musculoskeletal robustness, and ectomorphy to relative linearity or slenderness. The Heath-Carter system expresses these components as a three-number rating rather than placing someone into one permanent body-type category.

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How accurate is a somatotype calculator?

A Heath-Carter somatotype calculation can be useful when the required measurements are taken using the correct anthropometric technique. Skinfold thickness, girths and bone breadths can vary depending on exactly where and how they are measured, so measurement consistency matters. For the most reliable result, use appropriate anthropometric equipment and repeat measurements under similar conditions.

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Can your somatotype change over time?

Yes, your somatotype rating can change because it describes your physique at a particular point in time. Changes in body fat, muscular development and body proportions can influence the three component scores. This is why endomorph, mesomorph and ectomorph should not be treated as fixed identities that determine what your body can achieve.

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What is the difference between an endomorph and an ectomorph?

In the Heath-Carter system, endomorphy represents the relative adiposity component while ectomorphy represents relative linearity or slenderness. Someone can have a relatively higher endomorphy score without being unable to become leaner, and a higher ectomorphy score does not mean that gaining muscle is impossible. The scores describe current physique characteristics rather than setting limits on training progress.

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Is being a mesomorph better for building muscle?

A higher mesomorphy score indicates a greater relative musculoskeletal component within the somatotype rating, but it does not guarantee better muscle-building results. Muscle growth is influenced by resistance training, progressive overload, nutrition, recovery and individual biology. Your current somatotype should therefore be treated as descriptive information rather than a prediction of your strength or hypertrophy potential.

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Should you use your somatotype to choose your diet or workout?

Somatotype alone is not a strong enough basis for deciding what you should eat or how you should train. Your calorie intake, protein intake, training history, goals, recovery and actual progress are much more useful variables when making fitness decisions. You can use your somatotype as an interesting way to describe your current physique, but it should not replace practical tracking and evidence-based training principles.

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