π©Ί Metabolic Syndrome Checker
The five ATP III criteria, checked in seconds.
For informational purposes only, not medical advice. Consult a healthcare professional.
Metabolic syndrome is diagnosed when any three of five risk factors cluster: a large waist, high triglycerides, low HDL, elevated blood pressure, and elevated fasting glucose. The ATP III cutoffs are waist over 40 inches for men or 35 for women, triglycerides 150+, HDL under 40 (men) or 50 (women), BP 130/85+, and fasting glucose 100+. The cluster roughly doubles cardiovascular risk and quintuples diabetes risk.
Enter the five measurements. The checker evaluates each against its cutoff and counts how many are met. Three or more means metabolic syndrome by ATP III criteria: a signal to act on lifestyle and to screen for diabetes, not a disease label to fear.
How to Use This Calculator
Measure waist at the navel with a tape, relaxed. Use recent fasting labs for triglycerides, HDL, and glucose, and a rested blood pressure reading. Enter all five plus sex. Read how many criteria are met and which ones they are: the specific misses tell you exactly what to work on.
Measure waist at the navel and note recent fasting labs and BP.
Enter all five values plus sex.
Read how many of the five criteria are met.
Target the specific criteria you miss with lifestyle changes.
The Five ATP III Criteria
HDL <40 (M) / <50 (F) | BP >= 130/85
Fasting glucose >= 100 | 3+ = syndrome
The National Cholesterol Education Program's Adult Treatment Panel III set these cutoffs in 2001 to capture insulin resistance's clinical footprint without needing an insulin assay. Each cutoff sits at a risk inflection: triglycerides 150 marks the point where remnant particles accumulate, HDL cutoffs mark impaired reverse cholesterol transport, 130/85 catches pre-hypertension's risk, and fasting glucose 100 is the prediabetes threshold. Waist cutoffs are ethnicity-adjusted in some guidelines (lower for Asian populations), a refinement worth knowing. The syndrome construct is debated, but the cluster predicts risk better than any single component.
Worked Example
A man with a 42-inch waist, triglycerides 180, HDL 38, BP 138/88, and fasting glucose 108: every single criterion is met, 5 / 5, which reads "Metabolic syndrome (3+ criteria)". Drop the waist to 38 inches and glucose to 95 and only 3 remain: still syndrome, showing how the criteria stack.
What Your Count Means
Zero to two criteria: risk factors present but no syndrome; address each on its own merits. Three or more: metabolic syndrome, which should trigger diabetes screening (A1C), a full cardiovascular risk assessment, and serious lifestyle intervention. The good news is reversibility: 5 to 10% weight loss, 150 minutes of weekly activity, and cutting sugary drinks and refined carbs can unwind multiple criteria at once. Medications treat individual components (BP, lipids, glucose) when lifestyle is not enough.
| Criterion | Men | Women |
|---|---|---|
| Waist | >40 in | >35 in |
| Triglycerides | >=150 mg/dL | >=150 mg/dL |
| HDL | <40 mg/dL | <50 mg/dL |
| Blood pressure | >=130/85 | >=130/85 |
| Fasting glucose | >=100 mg/dL | >=100 mg/dL |
A Call to Action, Not a Verdict
Metabolic syndrome is reversible, especially early. Work with your doctor on a plan covering activity, nutrition, sleep, and smoking, plus medications for individual components as needed. Do not try to game the criteria by optimizing one number while ignoring the rest. For informational purposes only, not medical advice. Consult a healthcare professional.
Related tools: LDL cholesterol calculator, blood pressure checker and BMI calculator.
For informational purposes only, not medical advice. Consult a healthcare professional.
Frequently Asked Questions
What are the 5 criteria for metabolic syndrome?
Large waist, triglycerides >=150, low HDL, BP >=130/85, and fasting glucose >=100. Any three make the diagnosis by ATP III.
Is metabolic syndrome a disease?
It is a risk cluster, not a disease itself. It predicts roughly double the cardiovascular risk and five times the diabetes risk.
Can metabolic syndrome be reversed?
Often yes: 5-10% weight loss, regular activity, and cutting refined carbs and sugary drinks can resolve multiple criteria.
What waist size is risky?
Over 40 inches for men, 35 for women by ATP III. Some guidelines use lower cutoffs for Asian populations.
Does metabolic syndrome mean I have diabetes?
No, but fasting glucose >=100 is one criterion and the cluster strongly predicts diabetes: get an A1C checked.
How common is metabolic syndrome?
Roughly 1 in 3 US adults meets the criteria, rising steeply with age and weight.
Which criterion matters most?
They cluster, so the count matters more than any one. Elevated fasting glucose and low HDL tend to carry the most predictive weight.
Do I need medication for metabolic syndrome?
Lifestyle first; medications target individual components (blood pressure, lipids, glucose) when they remain abnormal.
Can you reverse metabolic syndrome?
Yes, it is one of the most reversible risk clusters in medicine. Losing 5 to 10 percent of body weight, walking 150 minutes a week, and cutting sugary drinks and refined carbs can clear the diagnosis in months for many people. Blood pressure and triglycerides often respond first; waist and glucose take longer. Medication helps individual components but lifestyle reverses the pattern.
Why does waist size matter more than BMI here?
Belly fat is metabolically active in a way other fat is not: it releases inflammatory signals and free fatty acids straight to the liver, driving insulin resistance. Two people with the same BMI can have very different risk depending on where the fat sits. That is why the criteria use waist cutoffs, not BMI.