Inputs
Switching updates waist thresholds and required logic automatically.
Used to set an ethnicity-specific waist threshold.
cm
Measure midway between lowest rib and iliac crest.
/
mmHg
Results
No calculation yet.
Criteria met
–
AHA/NHLBI
Diagnosis by chosen standard
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Example data table
Click a row to load values.
| Ethnicity | Standard | Waist | TG | HDL | BP | FPG | Tx | Expected |
|---|---|---|---|---|---|---|---|---|
| American/Canadian | AHA | 104 cm | 160 mg/dL | 38 mg/dL | 136/88 | 108 mg/dL | BP,TG | Meets |
| South Asian or Chinese | IDF | 92 cm | 120 mg/dL | 37 mg/dL | 128/84 | 98 mg/dL | HDL | Meets |
| Japanese | IDF | 84 cm | 200 mg/dL | 55 mg/dL | 124/78 | 102 mg/dL | TG,Glucose | Needs waist |
| Europid | AHA | 100 cm | 130 mg/dL | 39 mg/dL | 132/86 | 90 mg/dL | HDL,BP | Borderline |
Important: This tool supports education and screening only. It is not medical advice. Always discuss results with a qualified clinician.
Formula used
Two widely used clinical definitions are implemented for adult men:
Metabolic syndrome risk factors
Factors that raise the chance of meeting these criteria.
- Things you can control: inactivity, unhealthy diet and large portions, smoking, heavy alcohol intake, and not getting enough quality sleep.
- Weight and fat distribution: overall overweight/obesity and especially abdominal (central) fat increase risk.
- Insulin resistance and prediabetes: reduced sensitivity to insulin often precedes higher glucose and clusters with other components.
- Age and family history: risk rises with age and with a family history of type 2 diabetes or cardiometabolic disease.
- Ethnicity/region: some populations (for example, South Asian, East Asian, Middle Eastern, Hispanic/Latino, and certain Indigenous groups) have higher risk and lower waist cut‑offs.
- Other medical factors: certain medicines and chronic inflammatory conditions may increase risk; discuss your personal risks with a clinician.
Who faces higher heart‑disease risk with metabolic syndrome?
In short: any adult who meets the syndrome criteria faces a higher chance of coronary heart disease and stroke compared with adults without the syndrome. The increase applies across ages and ethnicities.
- Men meeting ≥3 AHA/NHLBI criteria or IDF central obesity plus any two others.
- Older adults and men with abdominal obesity or high blood pressure.
- Those with prediabetes or type 2 diabetes, insulin resistance, or a strong family history.
- Smokers, people with chronic kidney disease, or chronic inflammatory conditions.
- Populations with lower waist cut‑offs (e.g., South Asian, East Asian, Middle Eastern, Hispanic/Latino, and some Indigenous groups) who may develop risk at lower BMI/waist.
This section is educational and summarizes widely cited cardiometabolic guidance. It does not replace personal medical advice.
- AHA/NHLBI 2005 – Metabolic syndrome is present if any 3 of 5 are met: increased waist, triglycerides ≥150 mg/dL, HDL <40 mg/dL, blood pressure ≥130/85 mmHg, fasting glucose ≥100 mg/dL. Drug therapy for each component counts as meeting that component.
- IDF 2005 – Requires central obesity by ethnicity-specific waist cut-offs plus any two of the same other components.
Ethnicity-specific male waist cutoffs used here: Europid ≥94 cm; South Asian/Chinese ≥90 cm; Japanese ≥85 cm; Ethnic South/Central American ≥90 cm; Sub‑Saharan African ≥94 cm; Eastern Mediterranean/Middle East ≥94 cm. For American/Canadian AHA use 102 cm; IDF uses ethnicity mapping when selected.
How to use this calculator
- Select the criteria standard and ethnicity/region.
- Enter waist, triglycerides, HDL, blood pressure, and fasting glucose. Choose units as needed.
- Tick medication boxes if on treatment for that component.
- Press Calculate to see components met, total count, and the diagnostic outcome.
- Export your results as CSV or PDF to share or archive.
Waist cut‑offs by ethnicity (men)
| Ethnicity/Region | Cut‑off (cm) | Notes |
|---|---|---|
| Europid | ≥ 94 | IDF reference male cut‑point |
| South Asian / Chinese | ≥ 90 | Lower cut‑point used |
| Japanese | ≥ 85 | Population‑specific value |
| Ethnic South/Central American | ≥ 90 | As per IDF guidance |
| Sub‑Saharan African | ≥ 94 | IDF reference male cut‑point |
| Eastern Mediterranean / Middle East | ≥ 94 | IDF reference male cut‑point |
| American/Canadian (AHA/NHLBI) | ≥ 102 | ATP III default; consider lower for some Asian origins |
Diagnostic component thresholds
| Component | Threshold | Counts as meeting? |
|---|---|---|
| Waist circumference | ≥ ethnicity‑specific cut‑off | Yes (central obesity) |
| Triglycerides | ≥ 150 mg/dL (1.7 mmol/L) | Or on drug therapy |
| HDL cholesterol (men) | < 40 mg/dL (1.03 mmol/L) | Or on therapy affecting HDL |
| Blood pressure | ≥ 130/85 mmHg | Or on antihypertensive therapy |
| Fasting plasma glucose | ≥ 100 mg/dL (5.6 mmol/L) | Or diagnosed diabetes / therapy |
Common mg/dL ↔ mmol/L equivalents
| Analyte | mg/dL | mmol/L (approx.) | Conversion |
|---|---|---|---|
| Triglycerides | 150 | 1.69 | mmol = mg/dL ÷ 88.57 |
| HDL cholesterol | 40 | 1.03 | mmol = mg/dL ÷ 38.67 |
| Glucose (fasting) | 100 | 5.6 | mmol = mg/dL ÷ 18 |
| Triglycerides | 200 | 2.26 | mmol = mg/dL ÷ 88.57 |
| HDL cholesterol | 35 | 0.90 | mmol = mg/dL ÷ 38.67 |
| Glucose (fasting) | 126 | 7.0 | mmol = mg/dL ÷ 18 |
Sources
- AHA/NHLBI Scientific Statement, 2005 update of ATP III criteria.
- International Diabetes Federation (IDF) consensus worldwide definition, 2005.
Results are for adult men. Thresholds vary by population.