Body Type Calculator

Determine your somatotype (Ectomorph, Mesomorph, Endomorph), body shape, and frame size from your measurements.

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Sex

Weight (lbs)

Weight (kg)

Height (ft)

Height (in)

Height (cm)

Wrist Circumference (in)

Measured at the smallest point above the wrist bone

Wrist Circumference (cm)

Hip Circumference (in)

Widest point around hips/buttocks

Hip Circumference (cm)

Shoulder Width (in)

Widest point across shoulders

Shoulder Width (cm)

Waist Circumference (in)

Narrowest point of the torso

Waist Circumference (cm)

Somatotype

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Enter your measurements and click Calculate

Body Shape

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Frame Size

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Waist-to-Hip Ratio

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BMI

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Determine your general somatotype (ectomorph, mesomorph, or endomorph), body shape, and frame size from your weight, height, and a few simple circumference measurements.

How It Works

How Body Type Calculator Works

Somatotype classification here is BMI-based: a BMI under 18.5 is treated as ectomorph-leaning (naturally lean, fast metabolism), 18.5–25 as mesomorph-leaning (naturally athletic build), and above 25 as endomorph-leaning (a build that stores fat more readily) — a simplified approach compared to the original Sheldon somatotype system, which used detailed body measurements rather than BMI alone.

Frame size is estimated from your wrist-to-height ratio as a percentage, with different thresholds for men and women — a smaller ratio indicates a smaller-boned frame, and a larger ratio a larger one, following a commonly used clinical rule of thumb for frame size assessment.

Body shape (pear, apple, hourglass, inverted triangle, or rectangle) compares your shoulder width, waist, and hip measurements relative to each other, while waist-to-hip ratio is calculated separately as a general cardiovascular risk indicator, with different healthy thresholds for men (under 0.90) and women (under 0.80).

Worked Example

See It In Action

A man weighing 165 lbs at 5'10" (177.8 cm), with a 6.5" wrist, 38" hip, 17" shoulder width, and 32" waist, has a BMI of about 23.7 (Mesomorph range), a wrist-to-height ratio of about 9.3% (Small frame for men), and a waist-to-hip ratio of about 0.84 (within the healthy range for men). Comparing his measurements, the calculator classifies his overall body shape as Pear.

Real-World Use Cases

Who Uses Body Type Calculator and Why

Getting a general somatotype classification (ectomorph, mesomorph, endomorph) as a simplified starting reference.
Estimating frame size from a wrist-to-height ratio to add context to a healthy weight range.
Checking waist-to-hip ratio as a general cardiovascular risk screening indicator.

Common Mistakes

Mistakes to Avoid

Treating the BMI-based somatotype result as equivalent to the original, more detailed 1940s Sheldon somatotype system — this calculator simplifies to BMI ranges rather than a full multi-measurement assessment.
Measuring shoulder width, waist, or hip inconsistently between check-ins, which shifts the body-shape classification (pear, apple, hourglass, etc.) even when your actual proportions haven't changed much.
Assuming your somatotype result is fixed — unlike frame size, which is based on largely fixed bone structure, BMI-based somatotype and body shape can shift with changes in body composition.

Pro Tips

Tips for Best Results

Treat frame size (from wrist-to-height ratio) as a relatively stable reference point, and somatotype/body shape as figures that can shift over time with training and nutrition.
Use the waist-to-hip ratio result alongside other measures rather than as a standalone health verdict — it's one general screening indicator among several.

Troubleshooting

Fixing Common Problems

My body shape classification doesn't match how I'd describe myself. — Re-check your shoulder, waist, and hip measurements for consistency — this classification compares those three relative to each other, so a measurement taken loosely or in a different spot can shift the result.

Glossary

Terms Explained

Somatotype: A general body-type classification — ectomorph (naturally lean), mesomorph (naturally athletic), or endomorph (stores fat more readily) — simplified here to BMI ranges.

Waist-to-hip ratio: Waist circumference divided by hip circumference, used as a general indicator of fat distribution and associated cardiovascular risk.

FAQ

Frequently Asked Questions

Is this the same as the scientific Sheldon somatotype system?

It uses the same general ectomorph/mesomorph/endomorph terminology but simplifies the classification to BMI ranges rather than the detailed multi-measurement assessment of the original 1940s Sheldon system — treat the result as a general, approachable reference rather than a clinical classification.

Can my body type change over time?

Yes — unlike genetics-based frame size (bone structure, which is largely fixed), your BMI-based somatotype classification and body shape can shift meaningfully with changes in body composition through training and nutrition.

Why does frame size matter?

Frame size (small, medium, or large, based on wrist-to-height ratio) is sometimes used alongside height and weight to contextualize a "healthy weight" range, since two people of the same height with different bone structures can carry noticeably different healthy weights.

What does waist-to-hip ratio tell me?

A higher waist-to-hip ratio is associated with more fat carried around the abdomen, which research links to somewhat higher cardiovascular risk compared with fat distributed more toward the hips — it is one general screening indicator among many, not a diagnosis.