What is waist-to-hip ratio?

Waist-to-hip ratio (WHR) is the ratio of waist circumference to hip circumference (WHR = waist ÷ hip). It measures the distribution of body fat — specifically, whether fat is carried around the abdomen (apple shape) vs. hips and thighs (pear shape). Central (abdominal) obesity is associated with greater cardiovascular disease, type 2 diabetes, and metabolic syndrome risk compared to fat stored in the hips and thighs.

What is a healthy waist-to-hip ratio?

WHO thresholds: Men — Low risk 0.85. These thresholds apply globally. However, some research suggests Asian populations may have increased metabolic risk at lower WHR values, consistent with lower BMI thresholds for Asian populations.

How does Japan measure obesity differently?

Japan uses absolute waist circumference for metabolic syndrome diagnosis rather than WHR. Japan's criteria: men with waist ≥85 cm, women with waist ≥90 cm are considered at risk. This is lower than the IDF (International Diabetes Federation) cutoffs for Japanese (men ≥90 cm, women ≥80 cm) and the WHO global standard. Japan uses this stricter abdominal obesity criterion as part of its national metabolic syndrome screening program (Tokutei Kenshin).

🌍 WHO Standard 🇯🇵 Japan Metabolic Syndrome 🌏 IDF Asia-Pacific

Waist-to-Hip Ratio Calculator

WHR measures where your body stores fat — which is a better predictor of heart disease risk than BMI alone. Japan uses different abdominal obesity thresholds than the WHO global standard.

Quick Answer

Healthy WHR: Men <0.90, Women <0.80 (WHO). High risk: Men ≥1.0, Women >0.85. Japan uses absolute waist circumference instead: men ≥85 cm or women ≥90 cm = metabolic syndrome risk. This is part of Japan's mandatory annual health check (Tokutei Kenshin). Abdominal fat is more metabolically dangerous than fat stored in hips/thighs.

Sex

Waist circumference (cm)

Measure at narrowest point, above belly button

Hip circumference (cm)

Widest point of buttocks / hips

WHR Risk Thresholds by Country Standard

Standard	Men (low risk)	Women (low risk)	Metric
🌍 WHO Global	<0.90	<0.80	WHR ratio — primary international standard
🇺🇸 USA — AHA / NIH	WHR <0.90; waist <102 cm	WHR <0.85; waist <88 cm	Both WHR and waist circumference used
🇬🇧 UK — NHS / NICE	WHR <0.90; waist <94 cm	WHR <0.85; waist <80 cm	NHS uses WHO thresholds; waist also measured
🇨🇦 Canada — Heart & Stroke	Waist <102 cm (DRI)	Waist <88 cm	Canada follows AHA/US cutoffs for waist circumference
🇦🇺 Australia — Heart Foundation	Waist <94 cm (AU)	Waist <80 cm	Heart Foundation AU adopts lower European-aligned cutoffs
🇯🇵 Japan — MHLW (Tokutei Kenshin)	Waist <85 cm	Waist <90 cm	Strictest major-country cutoff; mandatory annual screening
🌏 IDF — Asian/Pacific	Waist <90 cm	Waist <80 cm	Ethnic-specific; applies to East/South Asian populations

Frequently Asked Questions

Is WHR better than BMI? ▾

WHR is generally considered a better predictor of cardiovascular disease risk than BMI because it measures fat distribution, not just total weight. A 2015 study in The Lancet found WHR was a better predictor of heart attack risk than BMI across 52 countries. However, both metrics have limitations — body fat percentage or waist circumference alone are also useful clinical tools. The UK NHS, Canadian guidelines, and WHO all recommend measuring waist circumference in addition to BMI.

Why does Japan use different waist thresholds? ▾

Japan launched a national metabolic syndrome prevention program (Tokutei Kenshin) in 2008, requiring annual checkups for adults over 40. Japan uses waist circumference thresholds of ≥85 cm for men and ≥90 cm for women — lower than Western cutoffs — because Japanese people develop metabolic complications at lower levels of abdominal fat. This is part of the broader Asia-Pacific health framework that also uses lower BMI thresholds.

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Cite this page APA · MLA · BibTeX

APA

WorldCalculators.org. (n.d.). Waist-to-Hip Ratio Calculator: WHO Health Risk Levels. https://worldcalculators.org/calculators/waist-hip-ratio/

MLA

“Waist-to-Hip Ratio Calculator: WHO Health Risk Levels.” WorldCalculators.org, worldcalculators.org/calculators/waist-hip-ratio/.

BibTeX

@misc{worldcalculatorscalculatorswaisthipratio,
  title        = {Waist-to-Hip Ratio Calculator: WHO Health Risk Levels},
  author       = {{WorldCalculators.org}},
  year         = {n.d.},
  howpublished = {\url{https://worldcalculators.org/calculators/waist-hip-ratio/}}
}

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