Waist-to-Hip Ratio Calculator
Calculate waist circumference divided by hip circumference; the result is a ratio only.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Enter waist and hip circumferences in the same unit. This calculator reports only waist divided by hip; it does not classify risk, measure body fat or diagnose a health condition. Measurement location and technique affect the result.
Worked example
calculated with the default values below
Waist circumference (cm) 85 cm · Hip circumference 100 cm Waist-to-hip ratio 0.85
General background references
Disclaimer
These calculators are for general information only and are not a medical device, a diagnosis or a treatment plan. Reference ranges describe populations, not individuals, and do not account for pregnancy, medication, disability or athletic training. Discuss your own situation with a qualified healthcare professional.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
R = W ÷ H
- R
- Waist-to-hip ratio
- W
- Waist circumference
- H
- Hip circumference
Both circumferences must use the same unit; this page calculates only W÷H and applies no health-risk thresholds.
Frequently asked questions
What does this ratio tell me?
It is waist circumference divided by hip circumference when both are measured in the same unit. The calculator does not apply sex-specific thresholds or diagnose health risk; interpretation depends on appropriate measurement and clinical context.