Visceral fat: what it is, waist thresholds, and what a scale can and cannot tell you

What is visceral fat?

Visceral fat is a type of body fat located deeper inside you, in the abdomen. Cleveland Clinic describes it as fat that wraps around several internal organs, including the liver, kidneys, intestines, pancreas and stomach.³ The sources read for this guide define it by where it sits, not by how it looks.

That matters for one practical reason. A belly you can see is not the same as visceral fat. The tape measure and the mirror show the whole waist. Only imaging can separate the deep fat from the rest, as the measurement section below explains.⁵

The NIDDK says overweight and obesity may increase the risk of many health problems, especially if you carry extra fat around your waist.⁴ It also lists a large waist size as one of the five conditions used for metabolic syndrome, a group of conditions that raise the risk of heart disease, diabetes and stroke. You need at least three of the five.⁴

This page explains the numbers. It does not tell you whether your own are a problem. Only a health professional who knows your history can do that.

Waist thresholds from NIH and Cleveland Clinic

The practical stand-in for visceral fat is waist size. The National Heart, Lung, and Blood Institute (NHLBI) says that if most of your fat is around your waist rather than your hips, you are at higher risk for heart disease and type 2 diabetes. A waist of more than 35 inches for women or more than 40 inches for men increases that risk.¹

In its metabolic syndrome page, the NHLBI uses the same cutoffs for abdominal obesity, more than 40 inches for men and 35 inches for women. It adds that a provider may use different values depending on race and ethnicity.² Cleveland Clinic gives the same two waist values and two ratios, shown below.³

For the hip comparison in detail, see the guide to waist-to-hip ratio.

Worked examples: waist, hip and height

The arithmetic is simple. These examples use made-up numbers to show how the three ratios work.

The first example shows why one measure is not enough. The man's waist is under the 40-inch line, yet the ratio sits just above the 0.90 mark Cleveland Clinic gives.³ The measures can disagree near their edges, and that is a reason to measure properly and repeat, not to worry about a single reading.

To check your own height rule, divide your height in inches by 2. A 64-inch person has a limit of 32 inches. A 70-inch person has 35.

How to measure your waist at home

The NHLBI gives a short procedure: stand, place a tape measure around your middle just above your hipbones, and measure just after you breathe out.¹ Cleveland Clinic describes the same placement.³

1. Stand up straight. Feet together, arms relaxed, no sitting or leaning.¹
2. Place the tape. Wrap it around your middle, just above your hipbones, level all the way around.¹
3. Breathe out. Read the number just after a normal breath out, without pulling the tape tight.¹
4. Write it down. Record the inches with the date, and repeat at the same time of day.
5. Compare over weeks. Look at the trend, not a single reading.

The last two steps are plain good practice rather than something the sources specify. A tape is cheap, it does not need batteries, and it measures the thing the thresholds are written for. For many people it is a better tool than any number on a scale.

How is visceral fat measured?

A review in the International Journal of Obesity compared the techniques. It concluded that imaging methods such as computed tomography (CT) and magnetic resonance imaging (MRI) are the optimal techniques for accurate assessment of visceral fat. Methods other than imaging have limited potential for tracking changes. Anthropometric measurements, such as waist, can be useful to classify people by fat distribution and for population studies.⁵

The same review notes that CT involves ionizing radiation, which can matter when choosing a technique.⁵ That is one reason imaging is used for research or a clinical question and not for routine tracking at home.

What can a body composition scale say about visceral fat?

A scale that uses bioelectrical impedance passes a small current through the body and estimates composition from how it flows. Visceral fat sits deep in the abdomen, so the figure shown is a model output, not a picture of the fat.

Two studies tested this against imaging. In a 12-month weight-loss study of 19 adults, a consumer impedance device (Omron BF-500) was compared with MRI. It overestimated visceral fat, especially in men. Agreement with MRI was moderate to weak: correlations of 0.40 to 0.78 across time points, and 0.46 for changes over time. The authors conclude that impedance is useful for fat mass and muscle but limited in its ability to measure visceral fat.⁶

In 200 healthy Chinese adults, two single-frequency devices (Omron HBF-359 and Tanita BC-532) showed small mean biases against MRI for visceral fat level but wide limits of agreement.⁷ In plain words, the average can look fine while an individual reading is far off.

• What a scale can do: show a trend in its own index, if you weigh under the same conditions each time.
• What a scale cannot do: tell you how many square inches of visceral fat you have, or replace a scan.
• What it cannot say at all: whether any number is a problem for you. No institutional source read for this guide gives a healthy range for a scale's visceral fat level, so this page gives none.

Any visceral fat figure from a home scale, Chutex Vita included, is an estimate for tracking only. For the wider question of how far smart scales can be trusted, see the guide to how accurate smart scales are and the one on body fat percentage.

What can you do about waist size?

The NHLBI notes that health professionals recommend people diagnosed with overweight or obesity lose 5% to 10% of their initial weight over about six months. It adds that losing more than 3% to 5% of your weight can improve blood pressure readings, LDL cholesterol and HDL cholesterol.¹

As an example of the arithmetic, 5% of 200 lb is 10 lb, and 10% is 20 lb. The sources read here do not say which part of the body loses fat first, so this page does not promise a smaller waist from a given amount of weight loss. If you want to change your weight, talk to your health care professional about a plan that fits you.¹

For how body fat itself is read and tracked, see how to measure body fat at home and how to lower body fat percentage.

Frequently asked questions