Is your waist less than half your height?
The simplest health measure. A WHtR below 0.5 is the universal healthy threshold (200,000+ adult meta-analysis, Ashwell 2012).
What Your WHtR Means
What the Research Says About WHtR
Waist-to-height ratio has been proposed as a superior alternative to BMI by many researchers. A 2012 meta-analysis by Ashwell et al. in Obesity Reviews encompassing over 200,000 adults across 31 studies found that WHtR consistently outperformed both BMI and waist circumference in predicting:
- Type 2 diabetes — each 0.1 increase in WHtR was associated with a 50-70% increase in diabetes risk, even in normal-weight individuals
- Hypertension — WHtR was the strongest anthropometric predictor of high blood pressure across all age groups and ethnicities
- Metabolic syndrome — the combination of elevated triglycerides, low HDL, high blood pressure, and elevated glucose is better predicted by WHtR than by BMI
- All-cause mortality — WHtR predicts mortality at least as well as waist circumference, with the advantage of a simple universal threshold (0.5) that requires no age or gender adjustment
The "waist less than half your height" message has been promoted by public health campaigns in the UK, Japan, and several other countries because of its simplicity. Unlike BMI which requires calculation and reference charts, WHtR can be assessed by any adult: if your waist is greater than half your height, you carry excess abdominal fat.
WHtR vs Other Metrics
BMI
Does not distinguish fat distribution. Two people with BMI 25 can have very different WHtR values.
Waist circumference
Absolute measure — does not account for height. A 90 cm waist means different things for a short vs tall person.
BRI
More precise than WHtR but more complex to calculate. WHtR is simpler for everyday self-assessment.
How to Measure
- Height: Stand without shoes against a wall, use a flat object to mark the top of your head
- Waist: Measure at the level of your iliac crest (hip bone) using a flexible tape
- Ensure the tape is snug but not compressing the skin
- Measure at the end of a normal exhale — do not hold your breath or suck in
- Divide your waist circumference by your height (both in the same units)
Frequently asked questions
Quick answers to common questions
What is a healthy waist-to-height ratio?
The widely accepted healthy threshold is a WHtR below 0.5 — meaning your waist circumference should be less than half your height. Values of 0.5–0.6 indicate elevated risk, and above 0.6 indicates high risk. This simple cutoff is supported by a 2012 meta-analysis of over 200,000 adults published in Obesity Reviews.
Is waist-to-height ratio better than BMI?
Many researchers argue yes. A 2012 systematic review in Obesity Reviews found that WHtR outperformed both BMI and waist circumference in predicting cardiovascular risk factors, type 2 diabetes, and all-cause mortality. The advantage is that WHtR adjusts waist size for height — a tall person and a short person with the same waist have very different body shapes.
What is the ideal waist-to-height ratio for men?
For men, a WHtR below 0.5 is considered low risk, 0.5–0.57 is elevated risk, and above 0.57 is high risk. The "keep your waist less than half your height" rule applies equally to men and women.
What is the ideal waist-to-height ratio for women?
For women, the same threshold applies: below 0.5 is low risk. Some studies suggest women can tolerate slightly higher ratios (up to 0.53) with similar risk profiles, but 0.50 is the conservative healthy target.
How do I measure my waist for WHtR?
Measure at the level of your iliac crest (the top of your hip bone, roughly at belly button level). Stand upright, use a flexible tape measure, and measure at the end of a normal exhale. Do not suck in or hold your breath. Height should be measured without shoes.
What is the difference between WHtR and BRI?
WHtR is a simple ratio (waist/height), while BRI uses a more complex formula that models the body as an ellipse. Both adjust waist circumference for height and correlate strongly with health outcomes. WHtR is simpler for self-assessment; BRI is more precise and produces a wider range of values that better discriminate risk within the healthy range.
References
Peer-reviewed sources behind this calculator
- Ashwell M, Gunn P, Gibson S (2012). Obesity Reviews. Waist-to-height ratio is a better screening tool than waist circumference and BMI for adult cardiometabolic risk factors. doi:10.1111/j.1467-789X.2011.00952.x
- Browning LM, Hsieh SD, Ashwell M (2010). Nutrition Research Reviews. A systematic review of waist-to-height ratio as a screening tool for the prediction of cardiovascular disease and diabetes. doi:10.1017/S0954422410000144
- Savva SC, et al. (2000). International Journal of Obesity. Waist circumference and waist-to-height ratio are better predictors of cardiovascular disease risk factors in children than body mass index. doi:10.1038/sj.ijo.0801377
Show all 4 references
- Centers for Disease Control and Prevention (2021). NHANES 2011-2018. Body Measures (BMX) Data Documentation.
Methodology
WHtR = waist circumference / height (same units).
Risk thresholds: Ashwell M, et al. (2012). "Waist-to-height ratio is a better screening tool than waist circumference and BMI for adult cardiometabolic risk factors." Obesity Reviews, 13(3), 275-286.
Disclaimer: For informational purposes only. Not medical advice. Consult a healthcare professional for medical decisions.
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