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Waist-to-height ratio compares waist circumference directly to height, and some research suggests it may better reflect abdominal fat and related health risk than BMI alone, since it doesn't require separate height and weight-based charts.
This calculator finds your waist-to-height ratio and its general category.
How it works
Enter your waist circumference and height (in the same unit). The calculator divides waist by height to find the ratio, then compares it against commonly cited reference ranges.
- Enter waist circumference (cm).
- Enter height (cm).
- Click Calculate to see your results.
Examples
80cm waist, 170cm height
An 80cm waist and 170cm height gives a ratio of about 0.47, within the commonly cited healthy range (under 0.5).
Who should use it
- Tracking a general health indicator alongside other fitness metrics over time.
- Comparing waist-to-height ratio against the common "under 0.5" guideline.
Industry applications
- Health and fitness tracking
- Preventive health education
Advantages
- Simple to measure and calculate, requiring just two measurements.
- Doesn't need separate age, sex, or weight-based reference charts like some other health metrics.
Limitations
- A general health indicator, not a diagnostic tool — individual health risk depends on many additional factors.
Common mistakes to avoid
- Measuring waist circumference inconsistently (e.g., over clothing, or at different points on the torso) — measure at the navel, without clothing, for the most consistent results.
- Using different units for waist and height (like waist in inches and height in cm) without converting to match first.
Best practices
- Measure your waist at the level of your navel, without clothing and without pulling the tape measure too tight, for the most consistent and comparable result over time.
Tips
- Unlike BMI, waist-to-height ratio uses the same "under 0.5" guideline for both adult men and women, and doesn't require age-specific reference charts — making it a simple metric to track consistently over time.