Body shape classification uses the ratios between bust, waist, and hip measurements. A waist-to-hip ratio below 0.80 with balanced bust and hips indicates an hourglass shape; hips wider than bust suggests pear; a wider waist points to apple. Enter three measurements in any unit to get the shape classification and ratio breakdown.
The Five Body Shapes
- Hourglass: Bust and hips are roughly equal, waist is significantly narrower (waist-to-hip ≤ 0.80).
- Pear (triangle): Hips are wider than bust, with a defined waist.
- Apple (round): Waist is close to or exceeds bust measurement; weight carried in the midsection.
- Rectangle: Bust, waist, and hips are within a few inches of each other.
- Inverted triangle: Bust or shoulders are noticeably wider than hips.
How the Ratios Work
The calculator computes three ratios: bust/waist, waist/hip, and bust/hip. Waist-to-hip ratio is the most widely studied — the WHO associates ratios above 0.85 in women and 0.90 in men with increased cardiovascular risk. The other two ratios determine where the body carries more proportion. Together they assign one of five shape categories.
Measurement Tips
Measure bust at the fullest point of the chest. Measure waist at the narrowest point, usually just above the navel. Measure hips at the widest point of the buttocks. Use a flexible tape measure, keep it parallel to the floor, and stand naturally without pulling it tight. The unit does not matter as long as all three measurements use the same unit.
FAQ
Q: Can body type change over time?
A: Yes. Weight gain, weight loss, muscle development, and aging all shift proportions. Reassess whenever measurements change noticeably.
Q: Is body shape related to health risk?
A: Waist-to-hip ratio is an established indicator. Apple shapes (higher waist-to-hip ratio) are associated with greater cardiovascular and metabolic risk compared to pear shapes. The calculator is not a medical tool, but the ratio data can be discussed with a healthcare provider.
Q: Does this work for men?
A: The ratio math works for anyone, but the five shape names (hourglass, pear, etc.) are traditionally used for women's fashion and body analysis. Men's proportions tend to cluster around rectangle and inverted triangle.