Waist-to-Height Ratio Calculator

What is a healthy Waist-to-Height Ratio?

A healthy Waist-to-Height Ratio is below 0.50, meaning your waist circumference should be less than half of your height.

The same 0.50 target applies to men and women of most ages. As your ratio rises above 0.50, the amount of fat stored around your organs tends to rise with it, and so does your risk of heart disease and type 2 diabetes.

Waist-to-Height Ratio chart

Use this Waist-to-Height Ratio chart to see which category your score falls into, from healthy below 0.50 to high risk at 0.60 and above.

What should my waist be for my height?

Your waist should be less than half your height, so a healthy waist is roughly under 80 cm at 160 cm tall, under 85 cm at 170 cm, under 90 cm at 180 cm, and under 95 cm at 190 cm.

In inches the rule is identical: keep your waist under half your height in the same unit.

BMI vs Waist-to-Height Ratio

Waist-to-Height Ratio is often better than BMI because it accounts for where fat is stored, while BMI only uses total weight and height.

Using a BMI calculator and your Waist-to-Height Ratio together gives a fuller picture than either number alone.

How to measure your waist

Measure your waist at the midpoint between the bottom of your ribs and the top of your hip bones, standing relaxed just after breathing out.

• Wrap the tape around your bare waist, level and parallel to the floor.
• Stand up straight, relax, and breathe out before you read the number.
• Keep the tape snug but not digging into the skin.
• Do not hold your breath, pull the tape tight, or measure straight after a meal.

Waist-to-Height Ratio formula

To calculate your Waist-to-Height Ratio, divide your waist circumference by your height using the same unit for both.

Waist-to-Height Ratio and the NHS

The NHS uses the same rule as this calculator: keep your waist to less than half your height, which is a Waist-to-Height Ratio below 0.50.

This calculator applies the same evidence-based 0.50 threshold, so your result lines up with NHS guidance and with large population studies used by health services around the world.

How to improve your Waist-to-Height Ratio

To improve your Waist-to-Height Ratio, reduce abdominal fat through strength training, regular walking, higher protein intake, and better sleep.

Re-measure every 4 to 8 weeks. A falling ratio is one of the clearest early signs that your health is moving in the right direction.

Why Waist Measurements Matter During a Weight Loss Plateau

When the scale stops moving, your waist often keeps shrinking, which is one of the best reasons not to judge your progress by weight alone.

This trips a lot of people up, especially on a GLP-1. You are a few weeks in, the scale has parked itself on the same number for what feels like forever, and it is easy to assume everything has stalled. But the scale only tells you your total mass. It cannot tell you what that mass is made of. Your waist can.

The waist matters because of what tends to come off first, which is visceral fat, the deeper fat packed around your organs. That is the fat most tied to health risk, and it is often some of the earliest to go. So you can be losing exactly the fat that matters most while the number on the scale barely budges. A tape measure around your middle catches that when the scale misses it.

There is also the muscle side of it. If you are eating enough protein and doing any resistance training, you can be losing fat and holding, or even building, a little muscle at the same time. Muscle is denser than fat, so the scale can stay flat while your body genuinely changes shape underneath. Your waist to height ratio drops, your clothes fit differently, the mirror looks different, all while the scale plays dead. If you want to see that split for yourself, the fat vs muscle tracker estimates how much of your loss is coming from fat.

So during a stall, keep measuring your waist, not just weighing in. Re-measure every few weeks under the same conditions, first thing in the morning works well. If your waist is still falling, you are still winning, even if the scale is being stubborn. And if both the scale and your waist have genuinely gone flat for a while and you want to work out whether that is a normal plateau or something worth raising with your prescriber, that is exactly what the plateau analyzer is for. As always, loop in your clinician before you change your dose or your plan.

Frequently asked questions