CalcWaist-to-Hip Ratio Calculator
Waist-to-Hip Ratio Calculator. Free online calculator with formula, examples and step-by-step guide.
Waist-to-Hip Ratio (WHR) Calculator: abdominal obesity risk
The waist-to-hip ratio (WHR) is a simple indicator of fat distribution and abdominal obesity risk. This calculator uses your waist and hip circumferences to compute the ratio and compare it to common risk thresholds.
Waist-to-hip ratio formula
The WHR formula is straightforward:
WHR = waist / hip
Both measurements must use the same units (typically centimeters or inches). Higher WHR values typically reflect more central fat around the abdomen, which is associated with increased metabolic and cardiovascular risk.
Typical risk thresholds
Commonly used cut‑offs are:
- Men: WHR > 0.90 is considered at risk.
- Women: WHR > 0.85 is considered at risk.
The calculator outputs your WHR to one or two decimals and indicates whether it lies below or above these general thresholds.
Example 1: male with elevated risk
Problem: Male with 95 cm waist and 100 cm hip circumference.
- Calculation:
- WHR = 95 / 100 = 0.95.
- Interpretation:
- For men, 0.95 > 0.90 → suggests increased abdominal obesity risk.
Answer: WHR = 0.95, above the common risk threshold for men.
Example 2: female with low WHR
Problem: Female with 70 cm waist and 95 cm hips.
- Calculation:
- WHR = 70 / 95 ≈ 0.74.
- Interpretation:
- For women, 0.85 is a typical risk boundary; 0.74 is clearly below that.
Answer: WHR ≈ 0.74, generally considered a low abdominal risk pattern.
Common uses of the WHR calculator
- Assessing fat distribution beyond what BMI alone reveals.
- Monitoring central fat loss during diet and exercise programs.
- Complementing other metrics such as waist circumference and body fat percentage.
- Teaching the difference between central and overall obesity.
- Identifying shape changes that influence cardiometabolic risk.
- Providing context for lab results like glucose, lipids and blood pressure.
Common mistakes when measuring waist and hips
- Measuring waist at the wrong level (too high or too low on the torso).
- Taking measurements over thick clothing or belts that distort circumference.
- Measuring hips away from the widest part of the buttocks.
- Treating WHR as a diagnostic tool instead of one risk indicator among many.
Pro tip
Measure under consistent conditions—same tape, minimal clothing, similar time of day—to make month‑to‑month comparisons meaningful. Small but consistent changes in WHR can signal real improvements in fat distribution, even when scale weight moves slowly.
Neither is universally "better"; they provide different insights. BMI reflects weight relative to height, while WHR focuses on where fat is stored, which is critical for metabolic risk assessment.
No, as long as waist and hip are measured in the same unit, the ratio is identical. You can use centimeters or inches consistently without affecting WHR.
It does not automatically mean you are ill, but it indicates higher risk and deserves attention. Only a healthcare professional can judge your overall health and the need for further testing.
For tracking progress, once per month is typically enough. Large changes in shorter periods are unlikely and may simply reflect measurement error.