Health & Body Composition
Waist-to-Height Ratio Calculator
Keep your waist to less than half your height. This single rule outperforms BMI for predicting cardiovascular risk, check yours in seconds.
Waist-to-height ratio divides waist circumference by height, both in the same units. A ratio of 0.50 or less is considered healthy for most adults; above 0.50 indicates higher abdominal fat and cardiometabolic risk. Results are screening estimates, not diagnoses — confirm with a clinician before acting on them.
Healthy rule: waist ≤ half your height.
Stronger heart-risk predictor than BMI.
Works for muscular builds too.
Calculate Your Waist-to-Height
Your Waist-to-Height Ratio
What Is Waist-to-Height?
The waist-to-height ratio (WHtR) compares your waist circumference with your height. Because both scale with body size, one universal cut-off works for adults of any height.
The 0.50 rule, keep your waist below half your height, is supported by large studies as a better predictor of cardiometabolic risk than BMI, and it correctly handles muscular builds.
How It Is Calculated
WHtR = waist ÷ height (same units)
Healthy: WHtR ≤ 0.50 — “keep your waist to less than half your height”
Example: Example: waist 84 cm, height 175 cm → WHtR 0.48 (healthy zone)
Waist-to-height ratio risk bands (adults)
| WHtR | Risk band | Action |
|---|---|---|
| ≤ 0.40 | Low | Maintain healthy habits |
| 0.41–0.50 | Healthy | Stay in range |
| 0.51–0.60 | Increased | Lifestyle changes advised |
| > 0.60 | High | Seek clinical guidance |
Limitations
- Waist measurement technique matters, measure midway between the lowest rib and the hip bone.
- Use for adults; children's cut-offs differ.
- Doesn't replace blood pressure, lipids, and glucose checks.
- Pregnancy invalidates the measurement.
How to Measure Your Waist Correctly
- Find the midpoint. Locate the halfway point between your lowest rib and the top of your hip bone.
- Wrap the tape. Wrap the tape horizontally around your bare abdomen at that midpoint, standing relaxed.
- Measure after exhaling. Read the measurement at the end of a normal exhale, without pulling the tape tight.
- Divide by your height. Divide waist by height in the same units, 0.50 or less is the healthy target.
Sources & Review
References used for this calculator’s formulas and thresholds:
Waist-to-Height FAQ
What is a healthy waist-to-height ratio?
0.50 or less, your waist should be less than half your height. A 175 cm adult should keep the waist under about 87.5 cm.
Is waist-to-height better than BMI?
For cardiovascular risk prediction, yes, large meta-analyses show WHtR outperforms BMI and works for muscular people, since it measures abdominal fat directly.
How do I measure my waist for WHtR?
Wrap the tape around your bare abdomen midway between your lowest rib and the top of your hip bone, after a normal exhale.
Does the 0.50 rule work for everyone?
It works for adult men and women of all heights. Children need age-specific charts, and the measure isn't valid during pregnancy.
Please read this first: these results are educational estimates, not medical advice. For decisions about your health, talk to a qualified professional.