Waist-to-height ratio (WHtR)

Q: What WHtR is considered normal?

The healthy range is 0.40–0.49, that is, a waist less than half your height. Increased central obesity begins at 0.5, and 0.6 or above is high risk.

Q: Is WHtR better than BMI?

For assessing central obesity — often yes: it accounts for fat distribution and has a clearer link to mortality. But it is a complement to, not a replacement for, BMI and waist circumference.

The ratio of waist circumference to height

A tape measure and a height gauge as the ratio of waist to height

The waist-to-height ratio (WHtR) is waist circumference divided by height in the same units. The measure reflects central obesity and its associated risk better than BMI, because it accounts not only for belly size but also for body size.

The main advantage of WHtR is a simple universal rule: your waist should be less than half your height (WHtR < 0.5). It works for both sexes and most ethnic groups without separate tables.

Reference ranges

Categories per the NICE (2022) guidance for adults with a BMI below 35, regardless of sex and ethnicity.

Possible deficit	< 0.40
Healthy range	0.40 – 0.49
Increased central obesity	0.50 – 0.59
High central obesity	≥ 0.60

Important: The 0.5 threshold was chosen for ease of memory; the result should be interpreted together with waist circumference and the overall picture.

What an elevated level means

A WHtR of 0.5 or above indicates an excess of visceral fat and an increased risk of type 2 diabetes, hypertension and cardiovascular disease. A value ≥0.6 is a signal to "act": reduce the waist through diet and activity.

What a low level means

A WHtR in the 0.4–0.49 range is a healthy zone. Values below 0.4 may indicate a weight deficit and call for attention to nutrition, especially in older people and adolescents.

How the test is done

Formula: WHtR = waist circumference / height (both in centimeters). For example, a waist of 82 cm at a height of 170 cm gives 82/170 ≈ 0.48 — a healthy range. The waist is measured midway between the lower rib and the hip bone after a calm exhalation.

What affects the value

Error in measuring the waist — the main source of inaccuracy.
Very high muscle mass and height affect it less than they affect BMI, but extremes are worth considering.
Pregnancy, bloating overstate the waist and the ratio.

Calculate using this marker

Calculators where Waist-to-height ratio (WHtR) is used directly:

Waist-to-Height Ratio (WtHR) Abdominal fat and cardiometabolic risk from your waist-to-height ratio Open Waist-Hip Ratio (WHR) Your fat distribution, body shape, and cardiometabolic risk Open Body Mass Index (BMI) BMI and BMI Prime, WHO norms, waist-based risk, and the link to biological age Open Body Composition Body fat, muscle mass (FFMI, SMM, SMI), body shape, and ABSI — all in one Open

Frequently asked questions

What WHtR is considered normal?

The healthy range is 0.40–0.49, that is, a waist less than half your height. Increased central obesity begins at 0.5, and 0.6 or above is high risk.

Is WHtR better than BMI?

For assessing central obesity — often yes: it accounts for fat distribution and has a clearer link to mortality. But it is a complement to, not a replacement for, BMI and waist circumference.

Sources

info

This content is educational and does not replace consultation with a physician. Reference ranges may vary depending on the laboratory and method — rely on the ranges stated on your own test report.

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