Waist-to-Height Ratio (WHtR) Calculator: health indicator

The waist-to-height ratio (WHtR) is a simple indicator that compares your waist circumference to your height. This calculator evaluates your health risk based on this proportion.

WHtR formula

The formula is straightforward:

WHtR = waist / height

Both measurements must be in the same units. The universal healthy threshold is WHtR < 0.5, meaning your waist should be less than half your height.

Risk thresholds

• Healthy: WHtR < 0.50
• Increased risk: WHtR 0.50–0.59
• High risk: WHtR ≥ 0.60

Example 1: person with healthy WHtR

Problem: Person with 76 cm waist and 170 cm height.

1. Calculation:
   • WHtR = 76 / 170 ≈ 0.45.
2. Interpretation:
   • 0.45 < 0.50 → healthy.

Answer: WHtR ≈ 0.45, within the healthy range.

Example 2: person with increased risk

Problem: Person with 95 cm waist and 175 cm height.

1. Calculation:
   • WHtR = 95 / 175 ≈ 0.54.
2. Interpretation:
   • 0.54 is between 0.50 and 0.59 → increased risk.

Answer: WHtR ≈ 0.54, increased health risk.

Common uses of WHtR

• Quickly assessing cardiometabolic risk.
• Monitoring progress in weight loss programs.
• Complementing BMI with information about fat distribution.
• Educating about the importance of abdominal fat.
• Initial screening in medical consultations and wellness programs.
• Setting health goals based on body measurements.

Common mistakes with WHtR

• Measuring waist at the wrong location (should be midway between the last rib and the iliac crest).
• Not using the same units for waist and height.
• Treating WHtR as a complete medical diagnosis.
• Ignoring other factors like age, sex and body composition.

Pro tip

WHtR is considered by many experts to be superior to BMI because it distinguishes between abdominal fat (more dangerous) and peripheral fat. The rule "keep your waist below half your height" is easy to remember and apply.