What Is a Body Shape Calculator?
Enter four body measurements — bust, waist, high hip, and hip — to find your body shape category. The result tells you whether you are an Hourglass, Pear, Apple, Inverted Triangle, Rectangle, Spoon, or Top Hourglass, and gives you specific diet and fitness guidance for that shape.
Body shape analysis is based on the proportional ratios between your measurements rather than your size or weight. Two people with completely different weights can share the same body shape. This calculator uses a 7-shape classification model derived from research published in the International Journal of Clothing Science and Technology, which studied thousands of real body measurements to establish objective thresholds for each shape.
How to Measure Accurately
- Bust: Measure around the fullest part of your chest, over your bra. Keep the tape parallel to the floor.
- Waist: Measure around the narrowest point of your torso, typically just above your navel. Do not hold your breath or pull in.
- High hip: Measure around the upper swell of the hips, about 7 cm (3 inches) below your natural waist. This is NOT the widest point.
- Hip: Measure around the widest part of your buttocks. Stand with your feet together and keep the tape level.
The Classification Formula
All measurements are compared in inches using these thresholds (converted from cm automatically):
Example Calculation
Woman with bust 91 cm (36″), waist 66 cm (26″), high hip 86 cm (34″), hip 96 cm (38″):
- Hip − Bust: 38 − 36 = 2″ (less than 3.6″, so not a pear)
- Bust − Hip: 36 − 38 = −2″ (not inverted triangle)
- Hip − Waist: 38 − 26 = 12″ ≥ 9″ ✓
- |Bust − Hip|: |36 − 38| = 2″ — this is greater than 1, so not classic hourglass
- Result: Top Hourglass — bust slightly fuller than hips, defined waist
Reference: The 7 Body Shapes
| Shape | Key Feature | Best Diet Focus | Best Training Focus |
|---|---|---|---|
| ⧖ Hourglass | Bust ≈ Hip, defined waist | Balanced macros, maintain | Full body, core work |
| 🍐 Bottom Hourglass | Hip > Bust, waist defined | Lower carb, lean protein | Upper body broadening |
| 🔺 Top Hourglass | Bust > Hip, waist defined | Balanced, low sodium | Glutes and lower body |
| 🥄 Spoon | Wide hip shelf, narrow top | High protein, low sugar | HIIT + shoulder work |
| ▽ Triangle / Pear | Hip > Bust, soft waist | Anti-inflammatory, lean protein | Upper body lifting |
| △ Inverted Triangle | Bust > Hip, wide shoulders | High protein, moderate carbs | Lower body resistance |
| ▬ Rectangle | Bust ≈ Waist ≈ Hip | Slight surplus + protein | Glute focus, core definition |
What the Waist-Hip Ratio Means
The waist-hip ratio (WHR) is your waist measurement divided by your hip measurement. Beyond body shape, it is also used as a health indicator. The World Health Organization defines a WHR above 0.85 for females as a signal of abdominal obesity and increased cardiovascular risk.
| WHR (Female) | Health Risk Category |
|---|---|
| ≤ 0.80 | Low risk |
| 0.81 – 0.85 | Moderate risk |
| > 0.85 | High risk |
When This Calculator Is Useful
Shopping and Fit Guidance
Knowing your shape helps you pick clothing cuts that balance your proportions — A-line for triangles, wrap dresses for hourglasses, structured shoulders for inverted triangles.
Personalised Fitness Planning
Your shape reveals where you naturally store fat and how your muscle mass is distributed, helping a trainer build a programme that actually targets your imbalances.
Tracking Body Composition Changes
Re-measure every 4–6 weeks during a diet or training programme. Shifts in ratios show whether your composition is changing as expected, even before the scale moves.
Postpartum Body Assessment
After pregnancy, waist, hip, and bust proportions change significantly. This calculator helps you understand your current shape before starting a postpartum fitness plan.
This Body Shape Calculator is for informational and fitness planning purposes only. Body shape classification is based on proportional measurements and does not constitute a medical assessment. Shape categories reflect measurement ratios and are not indicators of health, attractiveness, or ideal weight. This tool is not intended to diagnose any health condition. Consult a healthcare provider for personalised health advice.