Overview
Waist-to-hip ratio compares abdominal fat with hip fat. Higher ratios are associated with higher metabolic risk in population studies, but the ratio is not a diagnosis and does not determine your health alone.
Formula
Ratio = waist circumference ÷ hip circumference, with both measurements in the same unit.
How it works
Measure the waist
At the narrowest point or per the chosen protocol, after exhaling.
Measure the hips
At the widest point of the hips, keeping the tape horizontal.
Read the ratio
The ratio, approximate threshold and category appear.
Worked examples
Man: 80 cm waist, 100 cm hip
The ratio is 0.80, below the common 0.90 threshold.
Woman: 85 cm waist, 95 cm hip
The ratio is 0.89, above the common 0.85 threshold.
Frequently asked questions
How is it different from waist-to-height?
Both assess fat distribution but use different comparisons. Waist-to-height compares with height; waist-to-hip compares waist with hip shape.
Are the thresholds universal?
0.90 and 0.85 are widely used for adults, but they are approximations and may vary by population.
Does a high ratio mean I am ill?
No. It is a statistical risk factor that needs a full assessment of blood pressure, glucose, lipids and history.
How do I measure accurately?
Use a non-stretch tape, stand straight, and take three horizontal readings.
This calculator is for educational and informational purposes only and is not a substitute for professional advice.