Waist-to-Hip Ratio Calculator
Measure your waist-to-hip ratio and see whether it falls in the healthy range for your sex, giving a simple picture of abdominal fat.
Recent
Formula
How the calculation works
Enter your waist circumference measured at the narrowest point and your hip circumference at the widest point, both in centimetres.
Choose your sex, because the healthy threshold differs: 0.90 for men and 0.85 for women under World Health Organization guidance.
The tool divides waist by hip to give the ratio and labels it low or high risk against that threshold.
Common mistakes
- Measuring the waist over clothing or at the navel instead of the narrowest point, which inflates the ratio and can wrongly signal high risk.
- Comparing your ratio with the opposite sex's threshold, since 0.85 is fine for a woman but sits above the healthy line for a man.
When to use it
- Use it to track abdominal fat over months, because the ratio points to where your body stores weight rather than how much you weigh.
- Use it before a health check to judge whether your waistline hints at a raised risk of heart and metabolic disease.
Worked example
A waist of 85 cm and hips of 100 cm give a ratio of 0.85, which stays below the 0.90 high-risk threshold for men, so the risk level is low.
Common questions
What waist-to-hip ratio is considered healthy?
A ratio of 0.90 or below for men and 0.85 or below for women is generally low risk, while higher values point to central obesity.
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