A healthy waist-to-hip ratio (WHR) is below 0.85 for women and below 0.90 for men. These thresholds, established by the World Health Organization, separate “normal” from “abnormal” based on where your body stores fat and the health risks that come with it. The ratio itself is simple: divide your waist measurement by your hip measurement. But what it reveals about your health goes deeper than a single number on a scale.
What the Numbers Mean
To calculate your WHR, measure your waist circumference and divide it by your hip circumference. A woman with a 28-inch waist and 36-inch hips has a ratio of 0.78, which falls in the healthy range. A man with a 36-inch waist and 38-inch hips has a ratio of 0.95, which crosses into the elevated-risk category.
For women, a ratio above 0.85 signals excess abdominal fat relative to the hips. For men, the threshold is 0.90. These cutoffs aren’t arbitrary. They mark the point where fat distribution patterns start correlating with higher rates of heart disease, type 2 diabetes, and metabolic dysfunction.
Why Fat Location Matters More Than Fat Amount
Your body stores fat in two fundamentally different ways, and where it accumulates changes what it does to your health. Fat around the hips, thighs, and buttocks is relatively passive. Fat packed around your organs in the abdominal cavity, called visceral fat, is biologically active and behaves more like an endocrine organ than a simple energy depot.
Visceral fat cells secrete proteins that directly affect how your body processes sugar and manages inflammation. One key protein, adiponectin, normally helps your cells respond to insulin and protects artery walls from damage. As visceral fat accumulates, adiponectin levels drop, making cells less responsive to insulin and leaving arteries more vulnerable. This is one reason abdominal obesity is so tightly linked to both diabetes and heart disease.
Visceral fat also attracts immune cells that trigger insulin resistance, a precursor to prediabetes. On top of that, fat cells in the abdomen release inflammatory signaling molecules that, when chronically elevated in the bloodstream, damage arterial walls and create the conditions for plaque buildup. In short, a high WHR doesn’t just mean you carry weight in your midsection. It means your fat tissue is actively working against your cardiovascular and metabolic health in ways that hip or thigh fat typically does not.
WHR vs. BMI: Which Tells You More
BMI has been the default measure of healthy weight for decades, but it has a well-known blind spot: it can’t distinguish between muscle and fat, and it says nothing about where fat sits on your body. A 2023 study published in JAMA Network Open tracked nearly 388,000 people until death and found that waist-to-hip ratio was a better predictor of future health problems than BMI. The likely reason is straightforward. WHR captures visceral fat levels, which BMI misses entirely.
This distinction becomes even more important as you age. Researchers at UCLA found that WHR was a more reliable measure of obesity-related risk in adults between 70 and 80, because the body composition changes that come with aging (loss of muscle mass, shifts in fat distribution, height loss from spinal compression) distort BMI readings. For older adults, BMI can look normal while dangerous abdominal fat quietly accumulates.
How WHR Changes With Age
Both men and women tend to accumulate more abdominal fat with age, even without gaining overall weight. Hormonal shifts play a major role. In women, the drop in estrogen during and after menopause redirects fat storage from the hips and thighs toward the abdomen, often raising WHR by several points over a few years. In men, declining testosterone promotes a similar shift, though it tends to happen more gradually.
The health stakes of these shifts are real. UCLA researchers found that in women aged 70 to 80, every 0.1 increase in WHR (say, from 0.80 to 0.90) was associated with a 28 percent relative increase in mortality rate. In men, the relationship was less gradual but more dramatic: men whose waists exceeded their hips (a ratio above 1.0) had a 75 percent higher rate of dying compared to those at 1.0 or below. These findings suggest that monitoring your ratio becomes more important, not less, as you get older.
How to Measure Correctly
Accurate measurement requires the right landmarks and a consistent technique. For your waist, find the top of your hip bone and the bottom of your ribs. The midpoint between them, roughly in line with your belly button, is where the tape goes. Breathe out normally (don’t suck in your stomach) and wrap the tape snugly but loosely enough that you can slide one finger beneath it.
For your hips, stand with your feet together and wrap the tape around the widest point of your buttocks. Keep the tape level all the way around, parallel to the floor. Measure directly against your skin or over thin clothing. Thick belts, bunched fabric, or a twisted tape will throw off your reading.
Divide your waist measurement by your hip measurement. Consistency matters more than perfection: measure at the same time of day, in the same state (before eating is ideal), and use the same tape measure. Small fluctuations from day to day are normal. What you’re watching for is the trend over weeks and months.
What You Can Do About a High Ratio
Visceral fat responds well to lifestyle changes, often more readily than the stubborn subcutaneous fat on your hips and thighs. Aerobic exercise is particularly effective at reducing abdominal fat stores, even when overall weight loss is modest. Studies consistently show that moderate-intensity activity like brisk walking, cycling, or swimming for 150 minutes per week can meaningfully reduce waist circumference within a few months.
Diet quality matters as much as calorie count. Diets high in refined carbohydrates and added sugars tend to promote visceral fat accumulation, while patterns emphasizing whole grains, vegetables, lean protein, and healthy fats work against it. Alcohol intake is another lever: regular heavy drinking is strongly associated with abdominal fat gain, which is where the term “beer belly” comes from.
Sleep and stress also play underappreciated roles. Chronic sleep deprivation and sustained psychological stress both elevate cortisol, a hormone that preferentially drives fat storage in the abdomen. Improving sleep quality and managing stress won’t transform your body overnight, but over time they create hormonal conditions that make it easier to lose visceral fat and keep it off.