Waist to Height Ratio Calculator
Assess obesity risk and cardiovascular health using the Ashwell Shape Chart
Calculate Your Waist to Height Ratio
Measure at the narrowest point, usually just above the belly button
Your standing height without shoes
Your Results
Example Calculation
Example: A person with a 28 inch (71 cm) waist and 5'7" (170 cm) height
Calculation: 71 ÷ 170 = 0.418
Result: OK category (healthy range)
How to Measure Correctly
Waist Measurement
Measure at the midpoint between the last rib and the top of the hip bone, usually just above the belly button
Height Measurement
Stand straight against a wall without shoes for accurate height measurement
Tips
Use a flexible measuring tape, breathe normally, and ensure the tape is level around your waist
Why WHtR Matters
Better predictor than BMI for cardiovascular risk
Assesses central obesity and abdominal fat
Simple rule: waist should be less than half your height
Suitable for adults and children over 5 years
Understanding Waist-to-Height Ratio
What is Waist-to-Height Ratio?
The waist-to-height ratio (WHtR) is a simple measurement that divides your waist circumference by your height. Both measurements should be in the same units (centimeters or inches). This ratio is a powerful indicator of central obesity and associated health risks.
Why is it Important?
- •Predicts cardiovascular disease risk
- •Assesses central (abdominal) obesity
- •More accurate than BMI for health risks
- •Simple to calculate and remember
The Ashwell Shape Chart
Created by Dr. Margaret Ashwell, this chart categorizes health risks based on WHtR values:
Take Care (< 0.4)
May indicate underweight; no need to reduce waist
OK (0.4 - 0.49)
Healthy range with low health risks
Consider Action (0.5 - 0.59)
Increased risk; consider lifestyle changes
Take Action (≥ 0.6)
High risk; immediate action recommended
Medical Disclaimer
This calculator is for informational purposes only and should not be considered as medical advice. The waist-to-height ratio is just one indicator of health risk. Individual factors such as age, genetics, muscle mass, ethnicity, and overall health status also influence health outcomes. This tool cannot replace professional medical evaluation. Always consult with qualified healthcare professionals for comprehensive health assessments and personalized medical guidance, especially if you have existing health conditions or concerns.