Understanding the waist to hip ratio calculator
Divide waist circumference by hip circumference and compare with a selected WHO reference threshold.
This page provides an equation-based estimate for education and planning. It does not diagnose a condition, measure an individual response, or replace professional care.
How to use this health calculator
- Choose appropriate inputs: Enter measurements using the units and ranges shown.
- Review the assumptions: Confirm that the model applies before interpreting the result.
- Calculate and interpret: Read the result together with its limitations and cautions.
- Use professional guidance when needed: Do not use a general calculator to change medication, treatment, or a clinician-directed plan.
Formula and variables
The output follows the stated arithmetic and assumptions; it is not an individualized diagnosis, prognosis, or treatment recommendation.
WHR = waist circumference ÷ hip circumference- W — Waist
- Waist circumference.
- H — Hip
- Hip circumference in the same unit.
Worked example
Waist is 80 cm and hips are 100 cm.
- Measurements
- 80 cm / 100 cm
- 80 ÷ 100 = 0.80.
Result: Waist-to-hip ratio is 0.80.
Interpret the result with its population, measurement, and clinical limitations.
Understanding your results
Equation result
The numerical output follows the displayed formula and entered assumptions.
Personal interpretation
Individual biology, measurement error, environment, health conditions and medicines can change real-world outcomes.
Assumptions
- Inputs are accurate and use the displayed definitions and units.
- The cited reference or equation applies to the intended educational comparison.
Limitations
- Measurement site and tape technique materially affect the ratio.
- Thresholds are population screening references and may not apply equally across age, ethnicity, pregnancy, transition, or clinical conditions.
- WHR does not directly measure visceral fat or diagnose disease.
Common mistakes
- Using different units for waist and hip.
- Pulling the tape tightly or measuring at inconsistent sites.
Practical use cases
Educational estimate
Explore how the inputs affect the equation result.
Consistent tracking
Compare estimates only when methods, units and conditions are consistent.
Planning and decision guide
Treat cautions as part of the result
Use consistent WHO measurement technique and interpret WHR with other clinical information rather than as a standalone diagnosis.
Escalate symptoms or clinical questions
Seek qualified medical advice for symptoms, diagnosed conditions, medicines, pregnancy, or individualized treatment decisions.
Frequently asked questions
Is this result individualized medical advice?
No. It is an educational calculation based on the displayed assumptions.
Can I use it to change treatment?
No. Treatment decisions require appropriate professional assessment.
Sources and review
- Waist Circumference and Waist–Hip Ratio: Report of a WHO Expert Consultation — World Health Organization. Accessed 2026-08-03.
Reviewed 2026-08-03.