Waist-to-Hip Ratio Calculator
Measure your waist-to-hip ratio (WHR) to assess abdominal fat distribution and cardiovascular health risk based on WHO guidelines.
Quick Answer
WHR is calculated by dividing your waist circumference by your hip circumference. For men, a WHR above 0.90 indicates high health risk. For women, a WHR above 0.85 indicates high risk. WHR is considered a better predictor of cardiovascular disease than BMI because it specifically measures abdominal fat distribution.
Measure at the narrowest point, usually just above the navel.
Measure at the widest part of the buttocks.
Your Results
WHR Scale
Measurement Summary
WHO Health Risk Thresholds
| Risk Level | Men (WHR) | Women (WHR) |
|---|---|---|
| Low Risk | < 0.85 | < 0.75 |
| Moderate Risk | 0.85 - 0.90 | 0.75 - 0.85 |
| High Risk | > 0.90 | > 0.85 |
About This Tool
The waist-to-hip ratio (WHR) is a simple anthropometric measure that compares the circumference of your waist to the circumference of your hips. It is calculated by dividing the waist measurement by the hip measurement. Unlike Body Mass Index (BMI), which only considers total body weight relative to height, WHR specifically targets how fat is distributed across your body, making it a more nuanced indicator of health risk related to abdominal obesity.
Why Fat Distribution Matters
Not all body fat is created equal. Research over the past several decades has consistently demonstrated that where you carry fat matters as much as, or even more than, how much total fat you carry. Fat stored around the abdomen, known as visceral fat or central adiposity, surrounds vital organs including the liver, pancreas, and intestines. This visceral fat is metabolically active, releasing inflammatory cytokines, free fatty acids, and hormones that disrupt insulin signaling, raise blood pressure, and contribute to atherosclerosis. In contrast, subcutaneous fat stored in the hips, thighs, and buttocks is comparatively benign and may even offer some metabolic protection. The waist-to-hip ratio captures this distinction by comparing the two primary fat storage regions of the body.
WHO Guidelines and Thresholds
The World Health Organization has established WHR thresholds for identifying individuals at increased risk of metabolic complications. For men, a WHR above 0.90 is classified as substantially increased risk. For women, the threshold is 0.85. These cutoffs are based on large epidemiological studies linking central adiposity to cardiovascular disease, type 2 diabetes, hypertension, and certain cancers. However, it is important to note that these thresholds were derived primarily from studies on European and North American populations. Emerging research suggests that different ethnic groups may have different optimal thresholds. For example, individuals of South Asian descent may face elevated cardiovascular risk at lower WHR values than the current WHO cutoffs suggest.
How to Measure Correctly
Accurate measurement is essential for meaningful results. To measure your waist circumference, stand upright, exhale normally, and place a measuring tape around the narrowest part of your torso, typically just above the navel and below the rib cage. The tape should be snug but not compressing the skin. For hip circumference, measure at the widest part of your buttocks with your feet together. Both measurements should be taken on bare skin or over thin clothing. Take each measurement twice and use the average for the most accurate result. Measurements taken after a large meal or with inconsistent posture can lead to inaccurate readings.
WHR Compared to Other Metrics
While BMI remains the most commonly used screening tool for obesity, a growing body of evidence suggests that WHR and waist circumference alone may be better predictors of cardiovascular events and mortality. A landmark study published in The Lancet analyzed data from over 27,000 participants across 52 countries and found that WHR was a significantly stronger predictor of myocardial infarction than BMI. Additional research published in the Journal of the American College of Cardiology confirmed that central obesity, as measured by WHR, is independently associated with heart failure risk even in individuals with a normal BMI. For the most comprehensive picture of body composition and health risk, clinicians often recommend using WHR alongside BMI, waist circumference, body fat percentage, and metabolic blood markers.
Limitations to Consider
Despite its usefulness, WHR has limitations. It cannot differentiate between visceral fat and subcutaneous abdominal fat without imaging techniques like CT scans or MRI. It also does not account for muscle mass in the hip or abdominal region, which can influence the ratio. Athletes with well-developed oblique or gluteal muscles may have different ratio profiles than sedentary individuals with similar health status. Additionally, WHR can remain unchanged if both waist and hip measurements increase proportionally, potentially masking overall weight gain. For these reasons, WHR is best used as one component of a broader health assessment rather than as a standalone diagnostic tool.