Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR), a marker of central adiposity and cardiovascular risk.
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Formula
A ratio below 0.5 is generally considered a marker of healthy body fat distribution.
Worked Example
Waist-to-Height Ratio and Metabolic Health
- Formula: WHtR = Waist Circumference / Height (both in same units, cm or inches)
- Below 0.4: may indicate underweight. 0.4 to 0.5: healthy range. 0.5 to 0.6: increased risk. Above 0.6: high risk
- The 0.5 boundary is universal, applying across all ages, sexes, and ethnicities
- WHtR outperforms BMI in predicting type 2 diabetes, cardiovascular disease, and metabolic syndrome
- Measure waist at the midpoint between the lowest rib and the top of the hip bone (iliac crest)
WHtR is a screening tool, not a diagnosis. If your ratio exceeds 0.5, discuss further assessment and lifestyle changes with your healthcare provider.
You can also calculate changes using our HOMA-IR Calculator or Calorie Deficit Calculator.
Frequently Asked Questions
Why use WHtR instead of BMI?
BMI cannot distinguish between muscle and fat and does not account for fat distribution. WHtR specifically measures central (abdominal) fat, which is the most metabolically dangerous type. A muscular person may have a high BMI but a healthy WHtR.
What is a healthy waist-to-height ratio?
A ratio below 0.5 is considered healthy for both men and women. The simple rule is: keep your waist circumference to less than half your height. Ratios above 0.5 indicate increased cardiometabolic risk.
Where exactly should I measure my waist?
Measure at the midpoint between the bottom of your lowest rib and the top of your hip bone (iliac crest). This is usually near the navel. Use a flexible tape measure, standing upright, at the end of a normal exhale.
What does a ratio above 0.6 mean?
A WHtR above 0.6 indicates high central adiposity and significantly elevated risk for cardiovascular disease, type 2 diabetes, stroke, and metabolic syndrome. Medical evaluation is recommended.
Does WHtR work for children?
Yes. Research supports the 0.5 boundary for children and adolescents as well. It is considered more reliable than BMI percentiles for predicting childhood obesity-related health risks.
How often should I check my WHtR?
Measuring monthly is reasonable if you are actively working on weight management. Otherwise, checking every 3 to 6 months alongside other health metrics provides a good trend picture.
Medical Disclaimer
This calculator is provided for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making any decisions based on these results. Do not disregard or delay seeking medical advice because of information obtained from this tool.
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I can help you understand the waist-to-height ratio calculator formula, interpret your results, and answer follow-up questions.
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Our AI assistant provides general estimates and advice only. Please consult a qualified healthcare professional before making any health-related decisions.
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