Waist-to-hip ratio and waist-to-height ratio from tape measurements, with the WHO risk cut-offs, the NICE bands and the WHO waist size category.
更新于 已验证的示例：5
Your waist-to-hip ratio is 0.86 (not increased risk by the WHO cut-off of 0.90) and your waist is 49 % of your height (healthy by NICE's bands).
Categories are read from the ratio rounded to 2 decimals, as displayed.
NICE bands: 0.4–0.49 healthy, 0.5–0.59 increased, 0.6 or more high.
86 cm against the WHO cut-offs of 94 cm (increased) and 102 cm (substantially increased) for men.
Waist-to-hip ratio (WHR) is waist circumference divided by hip circumference, and waist-to-height ratio (WHtR) is waist divided by height in the same unit. Both measure fat carried around the middle, which BMI misses. WHR is compared with the WHO 2008 cut-offs of 0.90 for men and 0.85 for women, and waist size alone with the WHO thresholds of 94 and 102 cm for men and 80 and 88 cm for women.
People use these ratios to screen for central obesity, which is linked to type 2 diabetes and cardiovascular disease. With the defaults, a man with an 86 cm waist, 100 cm hips and a height of 175 cm has a WHR of 0.86, below the WHO cut-off, and a WHtR of 0.49, inside NICE's healthy band of 0.4 to 0.49.
The cut-offs are population thresholds, mostly set in Europid adults, not diagnoses. They assume the WHO method: waist midway between the lowest rib and the top of the hip bone after a normal breath out.
核验来源：Python 3.8 decimal: 90/100 = 0.90 meets the WHO ≥ 0.90 cut-off; 90/175 = 0.5143 is in NICE's 0.5–0.59 band; 90 cm ≤ 94 cm
核验来源：Python 3.8 decimal: 70/98 = 0.7143 < 0.85; 70/165 = 0.4242 in NICE 0.4–0.49
核验来源：Python 3.8 decimal: 40/38 = 1.0526; 40/72 = 0.5556; 101.6 cm is above 94 cm but not above 102 cm (WHO)
核验来源：Hand calculation: 85/170 = 0.5, the start of NICE's 0.5–0.59 increased-risk band
Below 0.90 for men and below 0.85 for women, the cut-offs at which a 2008 WHO expert consultation placed substantially increased risk of metabolic complications. A man with an 86 cm waist and 100 cm hips has 0.86, under the line; the same waist with 94 cm hips gives 0.91, over it. These are population thresholds, so a ratio near the line says little about one person on its own.
WHO links a waist above 94 cm (37 in) in men and 80 cm (31.5 in) in women to increased risk of metabolic complications, and above 102 cm (40 in) and 88 cm (34.6 in) to substantially increased risk. These cut-offs come mainly from Europid populations. The International Diabetes Federation uses lower thresholds for South Asian and Chinese adults: 90 cm for men and 80 cm for women.
Under 0.5, the basis of the public-health message to keep your waist to less than half your height. NICE's bands, added to its obesity guidance in 2022, are 0.4 to 0.49 healthy, 0.5 to 0.59 increased and 0.6 or more high central adiposity. A 2012 meta-analysis by Ashwell and colleagues found WHtR a better screen for cardiometabolic risk than waist circumference or BMI.
WHO measures the waist midway between the lowest rib and the top of the hip bone at the end of a normal breath out, and the hips around the widest part of the buttocks, with the tape level and snug but not compressing the skin. The published cut-offs assume this method. Measuring at the navel gives a different number, and a 2 cm change in waist moves the ratio by 0.02 when hips are 100 cm.
准确性取决于输入值和方法的假设。十进制运算使用50位有效数字，但估算、数值方法和源数据的精度可能较低；显示时的舍入并不能消除这些限制。 已按独立来源核验的计算示例：5。 例如，“Boundary: man with WHR exactly 0.90”根据Python 3.8 decimal: 90/100 = 0.90 meets the WHO ≥ 0.90 cut-off; 90/175 = 0.5143 is in NICE's 0.5–0.59 band; 90 cm ≤ 94 cm进行核验。
WHO. Waist circumference and waist–hip ratio: report of a WHO expert consultation, Geneva, 8–11 December 2008 (published 2011); NICE. Obesity: identification, assessment and management (CG189), 2022 update — waist-to-height ratio; Ashwell M, Gunn P, Gibson S. Waist-to-height ratio is a better screening tool than waist circumference and BMI. Obes Rev 2012;13:275–286.
仅供参考，不构成医疗建议。这些公式描述的是人群，并非您的个人情况；根据结果采取行动前，请咨询医务人员。
此计算器包含 5 个已解示例，答案来自独立来源。这些示例会在测试套件中运行，你也可以在此运行验证。
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