What Is the Waist-to-Hip Ratio?
The waist-to-hip ratio (WHR) is your waist circumference divided by your hip circumference. Unlike BMI, which measures total body mass relative to height, WHR measures fat distribution — how much fat sits around your abdomen versus your hips. Abdominal (visceral) fat is metabolically active and is strongly linked to cardiovascular disease, type 2 diabetes, and insulin resistance.
The World Health Organization classifies WHR risk in 4 tiers for women and 3 tiers for men. A WHR above these thresholds indicates central obesity even in people who appear healthy by BMI alone.
WHO Health Risk Classification
| Sex | Low risk | Moderate risk | High risk | Very high risk |
|---|---|---|---|---|
| Women | < 0.80 | 0.80 – 0.84 | 0.85 – 0.89 | ≥ 0.90 |
| Men | < 0.90 | 0.90 – 0.99 | ≥ 1.00 | — |
Source: WHO (2008). Waist circumference and waist-hip ratio: report of a WHO expert consultation.
5-Shape Body Type Classification
Adding a bust measurement enables the full 5-shape system. Without bust, only 3-shape classification (apple, pear, rectangle) is possible from WHR alone.
| Shape | WHR | Pattern | CVD risk |
|---|---|---|---|
| 🍎 Apple (android) | High | Waist ≈ hips | Elevated |
| 🍐 Pear (gynoid) | Low | Hips >> bust | Lower |
| ⏳ Hourglass | Low | Bust ≈ hips, narrow waist | Low |
| ▬ Rectangle | Moderate | All similar | Moderate |
| 🔻 Inverted triangle | Low | Bust >> hips | Low |
How to Measure Correctly
- Waist: Narrowest point between ribcage and hip bone. Breathe out normally — do not suck in.
- Hips: Widest point across the buttocks. Stand with feet together, tape horizontal.
- Bust (optional): Fullest part of chest, tape horizontal across shoulder blades.
- Measure in the morning before eating. Take 2–3 readings and average them.
Ideal WHR — Singh (1993) Attractiveness Research
Devendra Singh's 1993 study found that across cultures, a WHR of 0.70 in women and 0.90 in men is consistently rated most attractive. Singh argued this reflects evolved signals of reproductive fitness — a WHR of 0.70 in women correlates with healthy estrogen levels, fertility, and lower chronic disease risk. The attractiveness ideal and the WHO low-risk threshold coincide for men (0.90) but differ for women, where 0.70 is well below the WHO moderate-risk threshold of 0.80.
WHR vs. BMI
BMI ignores where fat is stored. A person can have normal BMI yet carry dangerous visceral fat — called normal-weight central obesity — which carries similar cardiovascular risk to clinical obesity. The INTERHEART study (52 countries, 27,000 participants) found WHR a stronger predictor of heart attack risk than BMI. Use both: BMI for overall weight classification, WHR for fat distribution risk.
Frequently Asked Questions
What is a good waist-to-hip ratio?
According to the WHO, a healthy WHR is below 0.90 for men and below 0.85 for women. For optimal attractiveness and lowest cardiovascular risk, research by Singh (1993) identifies 0.70 for women and 0.90 for men as the ideal values.
What does my waist-to-hip ratio say about my health?
A higher WHR indicates more abdominal (visceral) fat, which is associated with increased risk of cardiovascular disease, type 2 diabetes, and metabolic syndrome. WHR is a better predictor of these risks than BMI because it captures fat distribution rather than total weight.
What is the difference between apple and pear body shape?
Apple shape (android) means you carry more fat around your abdomen — your waist is close in size to your hips. Pear shape (gynoid) means your hips are wider than your waist and bust, with fat stored in the lower body. Apple shape carries higher cardiometabolic risk than pear shape.
How do I measure my waist for WHR?
Measure your waist at the narrowest point, usually midway between the bottom of your ribcage and the top of your hip bone. Keep the tape horizontal, breathe out normally, and do not pull the tape tight.
How do I measure my hips for WHR?
Measure your hips at the widest point across your buttocks — typically 7–9 inches below your waist. Stand with feet together and keep the tape horizontal.
Is WHR or BMI a better health indicator?
WHR is generally considered a stronger predictor of cardiovascular risk than BMI because it reflects fat distribution, not just total mass. Normal-weight individuals with central obesity (high WHR) have greater risk than overweight people with healthy fat distribution. Use both metrics together for the most complete picture.
What does the hourglass body shape mean?
Hourglass shape means your bust and hips are roughly equal in size with a significantly narrower waist (typically at least 25% smaller than bust or hip). It is associated with lower WHR and gynoid fat distribution.
What is the inverted triangle body shape?
Inverted triangle (V-shape) means your bust or shoulders are significantly wider than your hips. This is common in athletes and swimmers. It is distinct from apple shape — the wider measurement is the chest, not the waist.
Can I change my waist-to-hip ratio?
Yes, primarily through fat loss. Losing visceral fat reduces waist circumference more than hip circumference, improving your ratio. Resistance training can also build hip and glute mass. Total caloric deficit combined with compound training works best.
What is the bust-waist-hip ratio used for?
Adding bust measurement enables full 5-shape body type classification: apple, pear, hourglass, rectangle, and inverted triangle. Without bust, only 3-shape classification is possible from WHR alone. The 5-shape system is widely used in fashion, fitness, and health assessments.