Waist-to-Hip Ratio (Advanced) Formula
Understand the math behind the waist-to-hip ratio (advanced). Each variable explained with a worked example.
Formulas Used
Waist-to-Hip Ratio
whr = waist_inches / hip_inchesWaist-to-Height Ratio
whtr = waist_inches / height_inchesWaist
waist_cm = waist_inches * 2.54Variables
| Variable | Description | Default |
|---|---|---|
waist_inches | Waist Circumference(inches) | 36 |
hip_inches | Hip Circumference(inches) | 40 |
height_inches | Height(inches) | 70 |
How It Works
Waist-to-Hip Ratio (WHR)
WHR = Waist / Hip
Risk Levels (Male)
| WHR | Risk | |---|---| | <0.90 | Low risk | | 0.90-0.99 | Moderate risk | | >1.00 | High risk |
Waist-to-Height Ratio (WHtR)
WHtR = Waist / Height
A WHtR above 0.5 indicates increased health risk regardless of BMI. This metric is gaining recognition as a simple and effective health screening tool.
Worked Example
A male: waist 36 inches, hips 40 inches, height 70 inches.
waist_inches = 36hip_inches = 40height_inches = 70
- 01WHR = 36 / 40 = 0.900 (Low to moderate risk boundary)
- 02WHtR = 36 / 70 = 0.514 (Slightly above 0.5 threshold)
- 03Waist = 91.4 cm
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