Waist-to-Height Ratio Calculator
Your waist-to-height ratio (WHtR) is a simple but powerful measure of central body fat and health risk. Just divide your waist circumference by your height. A ratio under 0.5 means your waist is less than half your height, which research consistently links to lower risk of heart disease and diabetes.
The waist-to-height ratio has emerged as one of the most practical health screening tools available. A 2012 systematic review and meta-analysis published in Obesity Reviews, analyzing data from over 300,000 adults across multiple ethnic groups, concluded that WHtR was a significantly better predictor of cardiometabolic risk factors (diabetes, hypertension, dyslipidemia, and cardiovascular disease) than BMI or waist circumference alone.
The beauty of WHtR is its simplicity: the 0.5 boundary applies across all ages, genders, and ethnicities. The message is "keep your waist to less than half your height." This single threshold outperforms BMI, which requires different cutoffs for different populations and fails to distinguish between muscle mass and fat mass.
Why does waist size matter so much? Visceral fat, the fat stored deep in the abdomen around internal organs, is metabolically active and releases inflammatory compounds that increase cardiovascular and metabolic risk. Waist circumference is a practical proxy for visceral fat that does not require expensive imaging. When you combine it with height, you get a ratio that accounts for body size, making it fair to compare across different body frames.
To measure your waist correctly: stand upright and relaxed, breathe out naturally, and wrap a flexible tape measure around your torso at the narrowest point (usually at or slightly above the navel). Do not suck in your stomach. The tape should be snug but not compressing the skin.
DISCLAIMER: This tool provides general health information and is not a substitute for professional medical evaluation. Individual health risk depends on many factors beyond WHtR. Consult a healthcare provider for personalized assessment.