Body Shape Calculator
Enter four body measurements and this calculator tells you which of the seven recognised body shapes best describes your silhouette - hourglass, top hourglass, bottom hourglass, spoon, triangle, inverted triangle or rectangle. Switch freely between centimetres and inches. Results update as you type, and the steps panel shows the exact comparisons used to reach your classification.
How the calculator classifies your body shape
The calculator compares four circumference measurements - bust, waist, high hip and hips - using a set of rules developed from a large-scale study of body proportions. It looks at the absolute differences between bust and hips, between each measurement and the waist, and at the high-hip-to-waist ratio to distinguish the spoon shape from the bottom hourglass. The results follow the same seven-shape system used by the International Journal of Clothing Science and Technology.
How to take accurate measurements
Use a soft measuring tape and stand naturally without tensing or breathing in. Bust: wrap the tape at the fullest part of your chest, parallel to the floor. Waist: find the narrowest part of your torso, usually just above the belly button, and wrap the tape snugly without compressing. High hip: measure about 7-8 cm below the natural waist around the top of the hip curve. Hips: find the widest point of your hips and buttocks, usually 18-22 cm below the waist, and keep the tape parallel to the floor. Taking each measurement twice and averaging the two readings improves accuracy.
What each body shape means
Hourglass shapes have roughly equal bust and hip circumferences with a clearly narrower waist. The top and bottom hourglass variants have the same waist definition but are slightly heavier at the top or bottom respectively. The spoon shape has a distinctive shelf at the high hip that sets it apart from the bottom hourglass. Triangle (pear) shapes carry more width at the hips with a less pronounced waist. Inverted triangles are broader at the shoulders and bust tapering to narrower hips. Rectangles have similar measurements throughout with little waist indentation.
Waist-to-hip ratio and health
The waist-to-hip ratio (WHR) is calculated alongside your body shape because it is a recognised screening tool for cardiovascular and metabolic risk. The World Health Organization suggests that a WHR above 0.85 for women or 0.90 for men may be associated with increased risk. Unlike body shape classification, which is purely proportional, WHR is a practical health indicator - a large waist relative to the hips often signals more visceral (abdominal) fat. Bear in mind that WHR is a screening tool, not a diagnosis; a doctor can put the number in clinical context.
The seven recognised body shapes
| Shape | Key characteristic | Typical proportions |
|---|---|---|
| Hourglass | Bust and hips roughly equal, defined waist | Bust = Hips, Waist narrow |
| Top Hourglass | Bust slightly fuller than hips, defined waist | Bust > Hips by 1-10 cm |
| Bottom Hourglass | Hips slightly fuller than bust, defined waist | Hips > Bust by 3.6-10 cm |
| Spoon | Hips much wider, pronounced high-hip shelf | Hips >> Bust, high hip ratio >= 1.19 |
| Triangle (Pear) | Hips wider than bust, less defined waist | Hips > Bust by >= 3.6 cm |
| Inverted Triangle | Bust/shoulders wider than hips | Bust > Hips by >= 3.6 cm |
| Rectangle (Straight) | Bust, waist and hips all similar | All differences below thresholds |
Classification criteria based on Simmons et al., International Journal of Clothing Science and Technology.
Frequently asked questions
What are the four measurements needed?
You need bust (at the fullest point of the chest), waist (at the narrowest part of the torso), high hip (at the top of the hip curve, roughly 7-8 cm below the waist) and hips (at the widest point over the buttocks). The high hip measurement is less commonly used by simple waist-hip tools but is essential for distinguishing the spoon shape from the bottom hourglass.
What is the most common body shape?
Research suggests the rectangle is the most common shape, followed by the triangle. Hourglass proportions are actually relatively rare in the general population, occurring in roughly 8 percent of women studied - despite being the most discussed shape in media.
Does body shape change over time?
Yes. Hormonal changes during puberty, pregnancy and menopause redistribute fat, so the same person can move between shape categories across their lifetime. Weight gain and loss also shift proportions, as fat distribution is partly genetic and partly driven by age and hormones.
Is this calculator only for women?
The seven-shape system was developed primarily from female body measurements, so the categories are most meaningful for women. Men can use the same inputs to find their proportions and WHR, but the hourglass, spoon and triangle categories were defined using female body data and may not translate as naturally to male silhouettes.
How is this different from a waist-hip ratio calculator?
A waist-hip ratio calculator divides your waist by your hips and gives one number used as a health screening indicator. This body shape calculator uses four measurements and a set of classification rules to name your overall silhouette. Both calculations are performed here: you get the shape name plus the WHR value in the results.
What if my result changes when I re-measure?
Small measurement variations are normal. The body shape boundaries are threshold-based, so if you are close to a boundary (for example, a bust-hip difference of exactly 9 cm) the result can shift with minor changes. Take each measurement twice and average the readings for the most consistent result.