Quick guide
How to use this calculator
- Use the labels and unit notes to enter the requested measurement, date, time, or observation exactly as recorded.
- Check the visible method, population, and unit basis before using the result; switch modes rather than converting values mentally.
- Read the calculation audit and limitations together. The result supports measurement or tracking and does not replace diagnosis, treatment, or urgent medical assessment.
Calculation method
How the waist-to-hip ratio calculator works
Waist-to-hip ratio = waist circumference divided by hip circumference; matching units cancel.
The ratio describes body-fat distribution indirectly. Interpretation depends on sex, ethnicity, age, measurement protocol, pregnancy status, and the authority being followed, so this page does not apply a universal classification.
Worked example
Waist-to-Hip Ratio example
A waist of 80 cm and hips of 100 cm produce a waist-to-hip ratio of 0.800.
Waist-to-hip ratio = waist circumference divided by hip circumference; matching units cancel.
Supported inputs
Precision and limits
Supported purpose
Supported for adults using a consistent WHO-style measurement protocol. It does not diagnose central obesity, predict an individual's disease risk, or replace locally applicable guidance.
Measurement quality
The output is only as reliable as the entered measurement, device, timing, units, and applicable reference population. Recheck unexpected values against the original record.
Clinical boundary
This calculator does not diagnose a condition, choose treatment, change medication, or determine that an urgent symptom is safe to monitor at home. Contact an appropriate health professional or local emergency service when the situation may be urgent.
Privacy
Entered health values and results stay in this browser tab. They are not placed in URLs, analytics, logs, local storage, session replay, or a cloud record by this calculator.
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