WHR During Pregnancy

What WHR Measures

Waist-to-hip ratio (WHR) is a simple anthropometric measure that compares the circumference of your waist to that of your hips. It is used worldwide as a screening tool for body fat distribution and associated cardiovascular risk. Unlike BMI, which only considers total body weight, WHR captures where fat is stored — a key distinction because abdominal (visceral) fat is more metabolically active and carries greater health risks than fat stored in the hips and thighs.

Research has shown that individuals with higher WHR — often described as an "apple" body shape — have a greater risk of cardiovascular disease, type 2 diabetes, and metabolic syndrome compared to those with lower WHR, or a "pear" body shape. The World Health Organization (WHO) formally adopted WHR as a complementary screening metric in its 2008 guidelines on waist circumference and waist-hip ratio, providing standardized cutoffs for men and women separately.

The WHR Formula

The formula for WHR is straightforward. You simply divide the circumference of your waist by the circumference of your hips, using the same unit of measurement for both:

The same formula applies whether you use centimeters or inches — as long as both measurements use the same unit, the ratio will be identical. Our calculator supports both metric and imperial units and converts automatically when you toggle between them.

Worked Example

Example 1 — High risk: A man has a waist circumference of 90 cm and hip circumference of 95 cm. WHR = 90 ÷ 95 = 0.95. Since 0.95 is ≥ 0.90, this falls into the High risk category for men, indicating elevated abdominal fat and associated cardiovascular risk.

Example 2 — Low risk: A woman has a waist circumference of 72 cm and hip circumference of 96 cm. WHR = 72 ÷ 96 = 0.75. Since 0.75 is below 0.85, this falls into the Low risk category for women, suggesting a favorable fat distribution pattern.

WHR Risk Classification Table (WHO Standard)

Why WHR Alone Is Not a Full Picture

WHR is a valuable screening tool, but it does not capture the full complexity of body composition and metabolic health. Because it is a ratio of two circumferences, it can be influenced by factors unrelated to abdominal fat. For example, a person with narrow hips due to skeletal structure may have a higher WHR without carrying excess abdominal fat. Conversely, someone with wide hips may have a misleadingly low WHR despite significant central adiposity.

WHR also does not distinguish between subcutaneous fat (the fat just under the skin) and visceral fat (the fat surrounding internal organs) — visceral fat is the more metabolically harmful of the two. Imaging techniques such as CT or MRI are the only methods that can measure visceral fat directly, though they are impractical for routine screening. For a more complete assessment, WHR is often used alongside BMI, waist circumference, and waist-to-height ratio as part of a broader health evaluation.

Known Limitations

• Does not measure total body fat or body fat percentage — it only describes fat distribution through circumference ratios.
• Measurement consistency matters: different landmarks for waist measurement (narrowest point vs. navel level vs. iliac crest) can produce meaningfully different ratios.
• Not suitable for pregnancy: hip and waist measurements change significantly throughout pregnancy and do not reflect fat distribution.
• Ethnic differences in risk thresholds: some studies suggest that Asian and South Asian populations may experience elevated metabolic risk at lower WHR cutoffs than the standard WHO thresholds.
• Does not account for muscle mass, bone structure, or overall fitness level — two individuals with the same WHR may have very different metabolic profiles.