Body Type Calculator
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Body TypeMesomorph
Waist-to-Hip Ratio0.80
Athletic and muscular build. Naturally strong with a medium frame.
Somatotype theory groups physiques into three broad shapes — ectomorph (lean and slim), mesomorph (athletic and muscular), and endomorph (broader and softer). This calculator infers your likely body type from your waist-to-hip ratio, a quick proxy for how mass is distributed around your frame. It offers a general starting point for tailoring training and nutrition, not a precise scientific classification.
Formula
Waist-to-hip ratio = waist / hip
- waist
- Waist circumference (any consistent unit)
- hip
- Hip circumference (same unit as waist)
- ratio
- Waist ÷ hip; <0.75 Ectomorph, 0.75–0.85 Mesomorph, >0.85 Endomorph
How it works
- Enter your waist and hip measurements in the same units; the tool divides waist by hip to get your waist-to-hip ratio.
- The ratio is mapped to a body type: below 0.75 suggests Ectomorph, 0.75 to 0.85 suggests Mesomorph, and above 0.85 suggests Endomorph.
- The result shows your body type, the exact ratio, and a short description of that physique's typical traits and tendencies.
Worked examples
A person with a 32 in waist and 40 in hips.
- Ratio = 32 / 40 = 0.80.
- 0.80 falls in the 0.75–0.85 band.
Waist-to-hip ratio 0.80 → Mesomorph (athletic, muscular build).
A person with a 28 in waist and 40 in hips.
- Ratio = 28 / 40 = 0.70.
- 0.70 is below 0.75.
Waist-to-hip ratio 0.70 → Ectomorph (lean, narrow build).
Frequently asked questions
- What are ectomorphs, mesomorphs, and endomorphs?
- They are the three classic somatotypes. Ectomorphs are naturally lean with difficulty gaining mass, mesomorphs build muscle readily with an athletic frame, and endomorphs carry a wider build with a tendency to store fat.
- Can my body type change?
- Your underlying bone structure is fixed, but your composition is not. Training and nutrition can shift your shape considerably, so many people show a blend of types rather than one pure category.
- How accurate is judging body type from waist-to-hip ratio?
- It is a rough heuristic. True somatotyping considers bone width, muscle mass, and fat distribution together, so use this result as a conversation starter for fitness planning rather than a definitive label.
- Why does waist-to-hip ratio also matter for health?
- Beyond body type, a higher waist-to-hip ratio is associated with greater central fat, which research links to higher cardiometabolic risk. Tracking the ratio over time can therefore be useful on its own.