Waist-to-Height Ratio Calculator (WHtR)

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Waist-to-Height Ratio Calculator (WHtR)

Waist-to-height ratio (WHtR) compares your waist circumference with your height. Because it reflects abdominal (central) fat, it adds information that BMI alone cannot give.

Measure your waist midway between the bottom of your ribs and the top of your hip bone, directly on skin or over thin clothing, breathing out normally with the tape snug but not compressing skin. Stand relaxed, repeat the measurement twice and use the average.

Waist-to-height ratio calculator

Waist circumference divided by height — a simple indicator of central fat distribution.

Measure halfway between the bottom of your lowest rib and the top of your hip bone, after breathing out normally.

Nothing you enter is stored. Results are computed on request and discarded.

Methodology & references

WHtR = waist circumference ÷ height, both measured in the same units. Boundaries used: below 0.40 slim, 0.40–0.49 healthy, 0.50–0.59 increased risk, 0.60 and above higher risk.

References

Limitations

  • Measurement technique strongly affects the result; follow the measurement guidance.
  • Not a medical diagnostic test and does not replace a clinical assessment.
  • Interpretation for children requires age-specific reference data.

How to use this calculator

  • Measure your waist following the guide above.
  • Enter your waist circumference and your height in matching units.
  • Press Calculate and read the ratio with its category.

Understanding your result

As a general guide used in public-health advice, keeping the ratio below 0.50 is associated with lower cardiometabolic risk, and higher bands indicate progressively greater concern. The bands are screening signals, not diagnoses.

No single measurement is complete. Researchers often suggest using WHtR and BMI together, and a healthcare professional can combine them with your history, blood pressure and lab results.

Methodology & references

WHtR = waist circumference ÷ height, both measured in the same units. Boundaries used: below 0.40 slim, 0.40–0.49 healthy, 0.50–0.59 increased risk, 0.60 and above higher risk.

Limitations

  • Measurement technique strongly affects the result; follow the measurement guidance.
  • Not a medical diagnostic test and does not replace a clinical assessment.
  • Interpretation for children requires age-specific reference data.

Frequently asked questions

How do I measure my waist correctly?

Measure midway between the bottom of your ribs and the top of your hip bone, breathing out normally, with the tape snug but not compressing skin. Repeat twice and use the average.

Is waist-to-height ratio better than BMI?

It captures central abdominal fat, which BMI misses, but no single measure is complete. Many researchers recommend using both together and letting a clinician interpret them.

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