About this calculator
Waist-to-hip ratio is an anthropometric measure of body-fat distribution. It is useful as a screening metric, not a diagnosis.
Waist-to-hip ratio = waist circumference ÷ hip circumference. WHO reviewed waist circumference and waist-hip ratio for cardiometabolic risk assessment.
Source-mapped educational formula
Educational estimate only; not a diagnosis, prescription, or treatment plan.
Formula and method
Waist-to-hip ratio = waist circumference ÷ hip circumference. This calculator displays common WHO-style action thresholds for educational screening.
Limitations and when not to rely on this result
- Educational estimate only; not a diagnosis, prescription, or treatment plan.
- Result depends on accurate inputs and may not apply to complex medical situations.
- Use clinician judgment, local guidance, and urgent care pathways when symptoms are severe.
Frequently asked questions
How do I calculate waist-to-hip ratio? +
Divide waist circumference by hip circumference using the same measurement unit.
What do the thresholds mean? +
They are screening thresholds for central fat distribution and cardiometabolic risk, not diagnostic cutoffs.
Should I use waist-to-height ratio instead? +
Both can be useful. Waist-to-height ratio is simpler for many users and is recommended in NICE guidance.
Can ethnicity affect interpretation? +
Yes. WHO notes that risk relationships and cut-points can vary by population.
Is this valid in pregnancy? +
Waist and hip measures are not appropriate for pregnancy weight-risk assessment without clinician guidance.