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Calculate waist-to-height ratio to screen central adiposity and cardiometabolic risk. The core rule: keep waist below half your height (WHtR < 0.50). Works in metric or imperial—the ratio is unitless. More informative than BMI alone for visceral fat distribution. Pair with diabetes risk screening. Not a clinical diagnosis.
Last updated: June 5, 2026
WHtR guides risk conversations. Metabolic syndrome, diabetes, and CVD diagnosis require clinician evaluation and laboratory testing.
Midpoint between lowest rib and iliac crest; tape horizontal, snug not tight.
Half-height limit: 34 in
0.471
Healthy / Normal — Very low cardiometabolic risk
Waist is 2 in below half-height.
Golden rule: WHtR < 0.50 — waist below half your height.
Healthy — 5′10″, 33 in waist
0.471
Healthy
Borderline — 5′8″, 34 in waist
0.500
Borderline healthy
Overweight — 175 cm, 94 cm
0.537
Overweight central adiposity
High risk — 165 cm, 99 cm
0.600
Highly overweight
Teaching cutoffs from meta-analysis and public-health guidance—individual risk varies.
| WHtR range | Category | Risk interpretation |
|---|---|---|
| < 0.42 | Underweight pattern | Low central fat — monitor overall nutrition |
| 0.42 – 0.49 | Healthy | Very low cardiometabolic risk (ideal < 0.50) |
| 0.50 – 0.52 | Borderline healthy | At upper healthy bound — avoid further waist gain |
| 0.53 – 0.57 | Overweight central adiposity | Elevated CVD and type 2 diabetes risk |
| 0.58 – 0.62 | Highly overweight | High metabolic syndrome correlation |
| ≥ 0.63 | Obese central pattern | Very high systemic cardiometabolic risk |
| Aspect | WHtR | BMI |
|---|---|---|
| What it measures | Waist ÷ height — central (abdominal) fat proxy | Weight ÷ height² — total mass index |
| Muscle vs fat | Less confounded by heavy musculature if waist stays lean | Athletes often “overweight” despite low visceral fat |
| Height normalization | 36 in waist on 6′4″ (0.47) vs 5′2″ (0.58) — same waist, different risk | Same BMI can hide apple vs pear shape |
| Clinical messaging | “Keep waist below half your height” (WHtR < 0.50) | Category thresholds vary by ethnicity and age |
| Height | Max waist (× 0.50) | Healthy example |
|---|---|---|
| 5′0″ (60 in) | 30 in | 28 in → WHtR 0.467 |
| 5′6″ (66 in) | 33 in | 31 in → WHtR 0.470 |
| 5′10″ (70 in) | 35 in | 33 in → WHtR 0.471 |
| 6′0″ (72 in) | 36 in | 34 in → WHtR 0.472 |
| 170 cm | 85 cm | 80 cm → WHtR 0.471 |
| 180 cm | 90 cm | 84 cm → WHtR 0.467 |
| Step | Action | Note |
|---|---|---|
| 1 | Stand straight, feet together, exhale normally | Do not suck in abdomen |
| 2 | Locate midpoint between iliac crest and lowest rib | Usually just above navel |
| 3 | Wrap flexible tape horizontally at that level | Tape snug, not compressing skin |
| 4 | Take two readings; use average if within 1 cm (0.4 in) | Measure before large meals |
| 5 | Record height without shoes | Stadiometer preferred in clinic |
| Group | Threshold teaching | Note |
|---|---|---|
| Children 6–16 years | WHtR ≥ 0.50 often used as elevated-risk screen | Growth charts still primary |
| Adults 18–49 | < 0.50 ideal; 0.53+ elevated | Gender differences modest at population level |
| Adults 50+ | < 0.50 still recommended; some cohorts allow ≤ 0.52 discussion | Sarcopenia may shift interpretation |
Waist is below half your height — the core public-health target (WHtR < 0.50).
Educational disclaimer: WHtR is a screening metric for learning and self-monitoring—not obesity diagnosis, metabolic syndrome classification, or treatment prescription. Confirm elevated risk with clinician evaluation, blood pressure, lipids, and glucose testing as appropriate.
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Suggested hashtags: #WHtR #VisceralFat #Cardiometabolic #HealthCalculator #TheCalcs