How a Waist-to-Hip Ratio Calculator Works
Your waist-to-hip ratio (WHR) is your waist circumference divided by your hip circumference. It is a quick indicator of how body fat is distributed. People who carry more weight around the middle (an apple shape) tend to face higher health risks than those who carry it around the hips and thighs (a pear shape).
Because both measurements are in the same unit, the ratio works identically whether you measure in centimeters or inches. The World Health Organization uses different thresholds for men and women because of natural differences in body composition.
WHR Risk Thresholds
- Men — Low risk: below 0.90, Moderate: 0.90 to 0.99, High: 1.0 and above
- Women — Low risk: below 0.80, Moderate: 0.80 to 0.84, High: 0.85 and above
- Ratio = waist measurement ÷ hip measurement
Why Fat Distribution Matters
Abdominal (visceral) fat surrounds your internal organs and is metabolically active in ways that raise the risk of type 2 diabetes, heart disease, and high blood pressure. WHR is a useful complement to BMI because it captures where fat is stored rather than just total weight.
- WHR can flag elevated risk even in people with a normal BMI.
- It is simple, requires only a tape measure, and needs no special equipment.
- Combine WHR with BMI and blood pressure for a fuller picture of your health.
Frequently Asked Questions
What is a healthy waist-to-hip ratio?
For men, a ratio below 0.90 is considered low risk, and for women, below 0.80 is low risk. Ratios at or above 1.0 for men and 0.85 for women indicate a higher risk of metabolic and cardiovascular conditions.
How is WHR different from BMI?
BMI measures overall weight relative to height, while WHR measures fat distribution. Someone can have a normal BMI but a high WHR if they carry excess fat around the abdomen, which is why doctors often use both metrics together.
Where exactly should I measure my waist?
Measure your waist at its narrowest point, typically just above the belly button, after breathing out normally. Measure your hips at the widest part of your buttocks. Keep the tape level and snug but not compressing the skin.
