What is the Waist-to-Height Ratio (WHtR)?

WHtR is calculated by dividing your waist circumference by your height, both in the same unit. A WHtR below 0.5 is considered healthy — the simple rule is "keep your waist to less than half your height."

Is WHtR better than BMI?

Some population studies and reviews report that WHtR performs well as a screening measure for cardiometabolic risk factors. It does not directly measure visceral fat or diagnose individual risk. BMI and WHtR are best interpreted together with broader health context.

Where exactly should I measure my waist?

Measure your waist at the level of your belly button (navel), at the end of a normal exhalation. Stand relaxed — do not suck in your stomach. Take 2–3 measurements and use the average.

What is a healthy waist-to-height ratio?

A WHtR below 0.5 is a commonly used screening threshold for many adults. Values above 0.5 can add context about central body size, but they are not a diagnosis on their own.

Does WHtR apply equally to men and women?

The 0.5 cutoff is commonly used as a simple public-health screening rule, but interpretation can still vary with age, ethnicity, measurement technique and individual health context.

Waist-to-Height Ratio Calculator: Healthy Waist Size by Height

Calculate your Waist-to-Height Ratio (WHtR), a simple waist-based screening measure that adds information about central body size. The rule: "Keep your waist to less than half your height."

Enter Your Measurements

Measure waist at belly button level after a normal breath out. Supports metric and imperial units.

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Waist-to-Height Ratio Reference Chart & Categories

According to the Ashwell Shape Chart, the classification of waist-to-height ratios differs slightly between men and women to account for biological fat distribution patterns. Use this table to interpret your results:

Classification	Men's WHtR Range	Women's WHtR Range	Screening Context
Extremely Slim	Below 0.43	Below 0.42	Low waist-to-height value; consider broader nutrition context.
Below 0.5 range	0.43 – 0.52	0.42 – 0.48	Near or below the commonly used half-height threshold.
Above 0.5 range	0.53 – 0.62	0.49 – 0.57	Above the common screening threshold; consider broader health context.
Higher WHtR range	Above 0.62	Above 0.57	Well above the common threshold; not a standalone diagnosis.

WHtR and BMI: How They Complement Each Other

WHtR Adds

✓ Includes waist circumference as well as height
✓ Adds context about central body size
✓ Uses an easy-to-remember 0.5 screening threshold
✓ Has been studied for associations with cardiometabolic risk factors

WHtR Limitations

✗ Doesn't account for muscle mass (like BMI)
✗ Measurement technique affects accuracy
✗ Less established than BMI in clinical settings

Best practice: use BMI and WHtR together, along with body fat percentage for the most complete picture.

How the Calculation Works

Asterisks Fit Waist-to-Height Ratio (WHtR) benchmarks are based on waist-based screening research:

Ashwell Shape Chart:The standard advice to "keep your waist to less than half your height" is commonly used as a simple public-health screening message.
Ashwell et al. (2012): A systematic review and meta-analysis reported that WHtR was useful for screening cardiometabolic risk factors in adult populations. It does not make WHtR a direct visceral-fat measurement or an individual diagnosis.
Measurement Protocol: Waist measurement location and tape technique affect results, so repeat measurements should use the same method.

Formula based on the published equation. Methodology reviewed by the Asterisks editorial team. Last content review: June 2025.

Last Updated: June 2026

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Frequently Asked Questions

WHtR is a screening tool, not a medical diagnosis. Individual factors such as muscle mass and ethnicity affect interpretation. Read full disclaimer.