Metabolic Syndrome Calculator

Criterion	Threshold	Your Value	Met?
Total criteria met	—

Criterion	Threshold
Waist circumference	> 102 cm (40 in) men, > 88 cm (35 in) women
Triglycerides	≥ 150 mg/dL, or on triglyceride medication
HDL cholesterol	< 40 mg/dL men, < 50 mg/dL women, or on HDL medication
Blood pressure	≥ 130/85 mmHg, or on antihypertensive medication
Fasting glucose	≥ 100 mg/dL, or on glucose medication

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Walk-through

How to Use This Calculator

4 steps

1

Enter your sex and waist circumference

Select your biological sex, since the waist circumference and HDL cholesterol thresholds differ by sex. Then enter your waist circumference, measured around the narrowest point level with the navel — use the cm/in toggle if you measured in inches.

2

Enter your triglycerides, HDL, blood pressure, and fasting glucose

Fill in your triglycerides and HDL cholesterol (both from a fasting lipid panel), your systolic and diastolic blood pressure, and your fasting glucose. The calculator updates the criteria checklist instantly as you type.

3

Check any medications that apply

If you are being treated with medication for elevated triglycerides, reduced HDL, high blood pressure, or elevated glucose, check the matching box — treatment counts toward that criterion even if your current measured value is below threshold. Waist circumference has no medication substitute.

4

Read your verdict and breakdown

The Criteria Check tab shows your score out of 5 and whether metabolic syndrome is likely (3 or more criteria met). Switch to the Verdict tab for context on what that means, or the Details tab for the full per-criterion breakdown and a comparison of your values with and without treatment.

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Reference

Formula & Methodology

1 formula

ATP III / 2005 AHA-NHLBI Revised Criteria (3 of 5)

Score = Waist + Triglycerides + HDL + BloodPressure + Glucose (each 0 or 1); Metabolic syndrome if Score ≥ 3

Each of the 5 criteria contributes 1 point if present: waist circumference above 102 cm (40 in) for men or 88 cm (35 in) for women; triglycerides at or above 150 mg/dL, or on triglyceride medication; HDL cholesterol below 40 mg/dL for men or 50 mg/dL for women, or on HDL medication; blood pressure at or above 130 mmHg systolic or 85 mmHg diastolic, or on antihypertensive medication; and fasting glucose at or above 100 mg/dL, or on glucose medication. A total score of 3 or more of the 5 criteria flags metabolic syndrome. This is the version published by the American Heart Association and National Heart, Lung, and Blood Institute (AHA/NHLBI) in 2005, which lowered the original 2001 NCEP ATP III fasting glucose cutoff from 110 mg/dL to 100 mg/dL to match the American Diabetes Association's revised impaired-fasting-glucose threshold. Waist circumference and HDL cholesterol are the only sex-specific criteria; the other three thresholds are the same for both sexes.

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High YMYL

Trust, Methodology & Sources

Reviewed by Calculover Editorial Review · Updated 2026-07-23 · 2 sources

Editorial accountability

Author: Calculover Editorial Team - Editor

Owner: Calculover Editorial Team - Editorial owner

Reviewer: Calculover Editorial Review - Medical-source review

Last reviewed: 2026-07-23

Last verified: 2026-07-23

Data effective: 2026-07-23

Methodology

This calculator applies the 5-criterion ATP III metabolic syndrome definition as revised in 2005 by the American Heart Association and National Heart, Lung, and Blood Institute (Grundy SM et al., Circulation 2005;112:2735-2752): waist circumference, triglycerides, HDL cholesterol, blood pressure, and fasting glucose, each contributing 1 point if the sex-specific threshold is met or the criterion's medication substitute applies, with a total score of 3 or more of 5 classified as metabolic syndrome likely.

Assumption: The calculator applies the 2005 AHA/NHLBI-revised ATP III criteria and thresholds exactly as published, with no modification.

Assumption: Waist circumference, triglycerides, HDL, blood pressure, and fasting glucose are entered accurately by the user; the calculator does not verify measurement technique or lab accuracy.

Assumption: A 'metabolic syndrome likely' result reflects the ATP III screening rule only — it does not by itself indicate any specific diagnosis or level of risk.

Limitations & guidance

This calculator does not replace a clinical evaluation, laboratory testing, or a diagnosis from a qualified healthcare professional.

The waist circumference thresholds used here are the standard US ATP III values; some international guidelines (e.g. the IDF consensus definition) use ethnicity-specific waist cutoffs that differ from these.

Meeting fewer than 3 of the 5 criteria does not rule out elevated risk from any single factor — ATP III is a screening threshold, not a safety cutoff.

Not a substitute for clinical judgment or professional medical advice. Any concerning result should be discussed with a healthcare provider.

Professional guidance: Metabolic Syndrome Calculator is for health education and screening-reference purposes only. It is not medical advice, diagnosis, or treatment, and does not replace care from a licensed healthcare professional.

Primary sources

Metabolic Syndrome: Diagnosis - NHLBI / National Institutes of Health

Diagnosis and Management of the Metabolic Syndrome: An American Heart Association/National Heart, Lung, and Blood Institute Scientific Statement (Grundy SM et al., Circulation 2005;112:2735-2752) - Circulation / American Heart Association

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Glossary

Key Terms Explained

8 terms

Metabolic syndrome A cluster of 5 risk factors — abdominal obesity, high triglycerides, low HDL cholesterol, elevated blood pressure, and elevated fasting glucose — that, when 3 or more are present together, is associated with a substantially higher risk of type 2 diabetes, heart disease, and stroke than any single factor alone.

ATP III criteria The diagnostic criteria for metabolic syndrome from the National Cholesterol Education Program's Adult Treatment Panel III (NCEP ATP III), as revised in 2005 by the American Heart Association and National Heart, Lung, and Blood Institute (AHA/NHLBI). Metabolic syndrome is flagged when 3 or more of 5 criteria are met.

Waist circumference threshold The ATP III cutoff for abdominal obesity: greater than 102 cm (40 inches) for men, or greater than 88 cm (35 inches) for women. Measured around the narrowest point of the torso, level with the navel. This criterion has no medication substitute.

Triglycerides A type of fat measured in a fasting blood lipid panel. The ATP III criterion is met at 150 mg/dL or higher, or if you are being treated with medication for elevated triglycerides.

HDL cholesterol High-density lipoprotein cholesterol, often called "good" cholesterol because it helps clear excess cholesterol from the bloodstream. The ATP III criterion is met when HDL is below 40 mg/dL for men or below 50 mg/dL for women, or if you are being treated with medication for reduced HDL.

Blood pressure (criterion) The ATP III blood pressure criterion is met at a systolic reading of 130 mmHg or higher, a diastolic reading of 85 mmHg or higher, or if you are on antihypertensive medication.

Fasting glucose Blood sugar measured after at least 8 hours without food. The ATP III criterion is met at 100 mg/dL or higher — the 2005 AHA/NHLBI-revised threshold, lowered from the original 2001 ATP III cutoff of 110 mg/dL — or if you are being treated with medication for elevated glucose.

3 of 5 criteria The ATP III diagnostic rule: metabolic syndrome is flagged when a person meets 3 or more of the 5 individual criteria (waist circumference, triglycerides, HDL, blood pressure, fasting glucose), regardless of which 3 (or more) are met.

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Scenarios

Real-World Examples

3 worked examples

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Robert — 3 of 5 Met, 52-year-old Male

Elevated waist, triglycerides, and HDL below threshold; blood pressure and glucose still within range

Waist circumference 105 cm (threshold: > 102 cm) Triglycerides 160 mg/dL (threshold: ≥ 150 mg/dL) HDL cholesterol 38 mg/dL (threshold: < 40 mg/dL) Blood pressure 120/78 mmHg (threshold: ≥ 130/85 mmHg) Fasting glucose 92 mg/dL (threshold: ≥ 100 mg/dL) Criteria met 3 of 5 Verdict Metabolic syndrome likely

Robert meets 3 of the 5 ATP III criteria — waist circumference, triglycerides, and HDL — while his blood pressure and fasting glucose remain within range. Meeting 3 criteria is enough to flag metabolic syndrome under ATP III, even though 2 of the 5 factors are currently normal. This is a good example of why the rule counts any 3 of 5, not a specific combination.

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Priya — 2 of 5 Met, 40-year-old Female

Slightly elevated waist and low HDL, but triglycerides, blood pressure, and glucose are all within range

Waist circumference 90 cm (threshold: > 88 cm) HDL cholesterol 45 mg/dL (threshold: < 50 mg/dL) Triglycerides 120 mg/dL (threshold: ≥ 150 mg/dL) Blood pressure 125/80 mmHg (threshold: ≥ 130/85 mmHg) Fasting glucose 95 mg/dL (threshold: ≥ 100 mg/dL) Criteria met 2 of 5 Verdict Metabolic syndrome not indicated

Priya meets 2 of the 5 ATP III criteria — waist circumference and HDL — which is below the 3-of-5 threshold, so metabolic syndrome is not indicated. Two elevated factors are still worth discussing with a clinician, since ATP III is a screening threshold rather than a safety cutoff; a factor can worsen over time even while the overall count stays below 3.

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Boundary case — exactly-at-threshold values, 45-year-old Male

Values sitting exactly at the published cutoffs, testing the strict-vs-inclusive comparison rules

Waist circumference 102 cm exactly (threshold: > 102 cm, strict — not met) HDL cholesterol 40 mg/dL exactly (threshold: < 40 mg/dL, strict — not met) Triglycerides 150 mg/dL exactly (threshold: ≥ 150 mg/dL, inclusive — met) Blood pressure 130/85 mmHg exactly (threshold: ≥ 130/85 mmHg, inclusive — met) Fasting glucose 100 mg/dL exactly (threshold: ≥ 100 mg/dL, inclusive — met) Criteria met 3 of 5 Verdict Metabolic syndrome likely

This borderline case sits exactly at every published cutoff. Waist circumference and HDL use strict inequalities (a value exactly at 102 cm or 40 mg/dL does NOT meet the criterion — you must exceed 102 cm, or fall below 40 mg/dL), while triglycerides, blood pressure, and fasting glucose use inclusive thresholds (a value exactly at 150 mg/dL, 130/85 mmHg, or 100 mg/dL DOES meet the criterion). The result is still 3 of 5 met, so metabolic syndrome is flagged — but the mix of strict and inclusive comparisons is worth understanding if your own numbers land right on a threshold.

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Deep Dive

Understanding the ATP III Metabolic Syndrome Criteria

3 chapters · 4 min read

Metabolic syndrome is not a single disease you either have or don't — it's a cluster of 5 measurable risk factors that, together, signal a substantially higher risk of type 2 diabetes, heart disease, and stroke than any one factor alone. This calculator applies the ATP III criteria, as revised in 2005 by the American Heart Association and National Heart, Lung, and Blood Institute, to check how many of the 5 factors you currently meet.

The 5 ATP III criteria and why medication counts

The ATP III framework defines 5 measurable criteria: waist circumference, triglycerides, HDL cholesterol, blood pressure, and fasting glucose. Metabolic syndrome is flagged when 3 or more of these 5 are present. Four of the five criteria — triglycerides, HDL, blood pressure, and fasting glucose — have a built-in medication substitute: if you are already being treated for elevated triglycerides, reduced HDL, high blood pressure, or elevated glucose, that counts as meeting the criterion even if your current measured value looks fine on treatment. This reflects the clinical reality that a controlled measurement on medication still represents an underlying risk factor. Waist circumference is the one exception — there is no medication that substitutes for abdominal obesity in this framework.

Why the thresholds differ by sex

Waist circumference and HDL cholesterol are the two criteria with sex-specific thresholds. Men are flagged at a waist circumference above 102 cm (40 inches), while women are flagged above 88 cm (35 inches) — reflecting typical differences in body-fat distribution between sexes. HDL cholesterol works the opposite way: men are flagged below 40 mg/dL, while women are flagged below 50 mg/dL, since women's HDL levels tend to run higher than men's on average. Triglycerides, blood pressure, and fasting glucose use the same threshold for both sexes.

How this differs from the original 2001 ATP III report

The original National Cholesterol Education Program's Adult Treatment Panel III (NCEP ATP III) report, published in 2001, used a fasting glucose threshold of 110 mg/dL. In 2005, the American Heart Association and National Heart, Lung, and Blood Institute published a joint scientific statement revising that threshold down to 100 mg/dL, aligning it with the American Diabetes Association's updated definition of impaired fasting glucose. This calculator uses the 2005-revised 100 mg/dL threshold, which is the version NHLBI currently publishes and the one most commonly used in US clinical practice today. All four other criteria — waist circumference, triglycerides, HDL, and blood pressure — are unchanged between the 2001 and 2005 versions.

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Questions

Frequently Asked Questions

6 questions

What is ATP III?+

ATP III (Adult Treatment Panel III) is a widely used set of diagnostic criteria for metabolic syndrome, revised in 2005 by the American Heart Association and National Heart, Lung, and Blood Institute (AHA/NHLBI).

How many criteria are needed to diagnose metabolic syndrome?+

Three or more of the five ATP III criteria — waist circumference, triglycerides, HDL cholesterol, blood pressure, and fasting glucose — must be met.

Do medications count toward a criterion?+

Yes. Being treated with medication for elevated triglycerides, reduced HDL, high blood pressure, or elevated glucose counts as meeting that criterion, even if your current measured value is below the threshold. Waist circumference has no medication substitute.

Are the thresholds different for men and women?+

Yes. Waist circumference and HDL cholesterol have sex-specific thresholds. Triglycerides, blood pressure, and fasting glucose thresholds are the same for both sexes.

Is this calculator diagnostic?+

No. This is a screening reference based on published ATP III criteria, not a medical diagnosis. A full clinical evaluation from a qualified healthcare professional is required to diagnose metabolic syndrome.

Is this medical advice?+

No. This tool is for informational and educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific health situation.

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