Know your type 2 diabetes risk in 60 seconds, and understand exactly what your A1C number means.
Diabetes Health Tools
Convert your blood sugar readings instantly or assess your risk.
A1C to Average Glucose (eAG)
Enter your A1C percentage to see your estimated Average Glucose.
mg/dL to mmol/L Converter
Convert between US standard and International blood sugar metrics.
Find out if you are at risk for developing Type 2 diabetes in the next 10 years by answering these validated questions.
Save your Diabetes Risk Assessment result
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What Your Risk Score Means
Your score reflects how many validated risk factors apply to you, weighted by their clinical significance. Use this table to interpret your result and decide your next step.
| Risk Level | Score Range | What It Means | Recommended Next Step |
|---|---|---|---|
| Low | 0 to 4 | Few risk factors currently present | Maintain healthy habits; rescreen every 3 years per ADA |
| Moderate | 5 to 8 | Some risk factors identified | Discuss formal screening with your doctor; consider a fasting blood glucose test |
| High | 9 to 12 | Multiple risk factors present; prediabetes possible | ADA recommends HbA1c or fasting glucose testing now |
| Very High | 13 or above | Strongly elevated risk profile | Request HbA1c and fasting glucose test promptly; discuss a prevention plan with your doctor |
A high score is not a diagnosis. Confirmation requires blood tests ordered by a qualified clinician. Use this result as a reason to act, not a reason to panic.
A1C Reference Chart
The A1C converter uses the internationally validated ADAG formula, endorsed by the American Diabetes Association and the European Association for the Study of Diabetes. Here is how each A1C percentage maps to estimated average glucose and clinical category.
| A1C % | Est. Avg Glucose (mg/dL) | Est. Avg Glucose (mmol/L) | Category |
|---|---|---|---|
| Below 5.7% | Below 117 | Below 6.5 | Normal |
| 5.7 to 6.4% | 117 to 137 | 6.5 to 7.6 | Prediabetes |
| 6.5 to 6.9% | 140 to 154 | 7.8 to 8.6 | Diabetes; within common target range |
| 7.0 to 7.9% | 154 to 177 | 8.6 to 9.8 | Diabetes; above ADA target (below 7% for most adults) |
| 8.0 to 9.9% | 183 to 240 | 10.2 to 13.3 | Diabetes; significantly above target |
| 10.0% or above | 240 or above | 13.4 or above | Diabetes; requires urgent clinical review |
Individual A1C targets vary based on age, other health conditions, and risk of hypoglycemia. Always confirm your personal target with your healthcare provider.
How This Calculator Works
Both tools use validated medical formulas and clinical guidelines, not arbitrary scoring.
Diabetes Risk Assessment
Risk factors are drawn from the American Diabetes Association validated risk criteria and the CDC Prediabetes Risk Test. Each factor is weighted by its relative contribution to type 2 diabetes risk in epidemiological studies. The result is a screening score, not a diagnostic instrument.
A1C to Estimated Average Glucose (ADAG Formula)
eAG (mg/dL) = (28.7 x A1C%) - 46.7
eAG (mmol/L) = eAG (mg/dL) / 18.018
Source: Nathan DM et al. Translating the A1C Assay into Estimated Average Glucose Values. Diabetes Care. 2008;31(8):1473-1478. Endorsed by ADA and EASD.
Population validated on: US adults across multiple ethnic groups. The ADA notes A1C may slightly underestimate true glucose levels in individuals with certain hemoglobin variants. Confirm with your lab if in doubt.
Type 2 Diabetes Risk Factors Explained
Knowing which risk factors apply to you is the first step toward prevention. The ADA and CDC identify both factors you cannot change and factors that respond directly to lifestyle intervention.
Non-Modifiable Risk Factors
- Age 45 or older. Risk increases significantly after age 45, though type 2 diabetes is now diagnosed at younger ages due to rising obesity rates.
- Family history. A parent or sibling with type 2 diabetes roughly doubles your risk.
- Race and ethnicity. Higher prevalence among South Asian, Hispanic, African American, Native American, and Pacific Islander populations.
- History of gestational diabetes. Women who had gestational diabetes have a roughly 50% higher lifetime risk of type 2 diabetes.
- Polycystic ovary syndrome (PCOS). Associated with insulin resistance independent of body weight.
Modifiable Risk Factors
- Overweight or obesity. Central (abdominal) fat drives insulin resistance more than fat stored elsewhere in the body.
- Physical inactivity. Less than 150 minutes of moderate activity per week significantly raises risk.
- High blood pressure. 130/80 or higher is an independent diabetes risk factor.
- Abnormal cholesterol or triglycerides. Low HDL or high triglycerides signal underlying metabolic dysfunction.
- Smoking. Smokers have a 30 to 40% higher risk of developing type 2 diabetes than non-smokers.
- Poor sleep. Untreated sleep apnea and chronic sleep deprivation impair insulin sensitivity directly.
- Dietary patterns. High intake of refined carbohydrates, sugar-sweetened beverages, and processed meat is associated with increased risk.
Understanding HbA1c
HbA1c (also written as A1C) measures the percentage of hemoglobin in your red blood cells that has glucose attached. Because red blood cells live roughly 90 days, A1C reflects your average blood glucose over that period, making it the most reliable single marker of long-term blood sugar control. A fasting glucose test can be affected by what you ate the day before; A1C is not.
For people already diagnosed with diabetes, A1C is the primary measure of how well treatment is working. The standard target for most adults with diabetes is below 7%, though this varies based on age, comorbidities, and individual hypoglycemia risk. A routine A1C does not require fasting and involves a simple blood draw.
Check how your fasting glucose compares alongside A1C with our Blood Sugar Checker.
Reducing Your Type 2 Diabetes Risk
The NIH-funded Diabetes Prevention Program (DPP) found that lifestyle changes prevent or delay type 2 diabetes in more than 58% of high-risk adults, outperforming metformin medication (31% reduction). These are the most effective evidence-based strategies:
- Modest weight loss. Losing just 5 to 7% of your body weight has substantial preventive effects. For a 200 lb person, that is 10 to 14 lbs.
- 150 minutes of moderate exercise per week. Brisk walking qualifies. Resistance training adds independent benefit.
- Dietary improvements. More vegetables, whole grains, and fiber; less refined carbohydrates, sugar-sweetened beverages, and processed meat.
- Adequate sleep. 7 to 9 hours per night. Address sleep apnea if present; it directly impairs insulin sensitivity.
- Stress reduction. Chronic stress elevates cortisol, which raises blood sugar and drives abdominal fat accumulation.
- Stop smoking. Diabetes risk begins to fall within a few years of quitting.
- Moderate alcohol consumption. Heavy drinking disrupts blood sugar regulation; moderate or no alcohol is generally protective.
For a practical dietary framework, see our Diabetes Diet Guide. Track your daily energy intake with the Calorie Calculator.
6 Health Numbers to Track Alongside Diabetes Risk
Diabetes risk does not exist in isolation. These six metrics interact directly with blood sugar control; improving one often improves the others.
Blood Sugar
Track fasting glucose and post-meal readings alongside your A1C for a complete picture of glycemic control.
Blood Pressure
Hypertension and diabetes frequently co-occur. Uncontrolled high BP accelerates kidney damage and cardiovascular complications in people with diabetes.
BMI
BMI above 25 (or 23 for South Asian populations) significantly raises diabetes risk. Even modest weight loss reduces risk measurably.
Daily Calories (TDEE)
Knowing your total daily energy expenditure helps calibrate the caloric deficit needed for safe, sustainable weight loss.
Sleep Debt
Sleep loss impairs insulin sensitivity. Even one week of 5-hour nights raises fasting glucose significantly in otherwise healthy adults.
Body Fat %
High body fat percentage, especially visceral fat, is a stronger predictor of insulin resistance than BMI alone.
Symptoms of Type 2 Diabetes
Type 2 diabetes often develops slowly with subtle or no symptoms for years. The CDC estimates that about 1 in 5 American adults with diabetes do not know they have it. When symptoms do appear, they may include:
- Increased thirst and more frequent urination
- Unexplained fatigue or weakness
- Blurred vision
- Slow-healing cuts or infections
- Frequent yeast infections or urinary tract infections
- Tingling, numbness, or pain in hands or feet
- Patches of darkened skin at the neck or armpits (acanthosis nigricans)
- Unexplained weight loss
Presence of any of these symptoms warrants a call to your doctor regardless of your risk score on this tool.
When to See a Doctor
- You are 35 or older and have not been screened for prediabetes or diabetes in the past 3 years
- Your risk score on this tool is moderate, high, or very high
- You have any symptoms listed in the section above
- A parent or sibling has type 2 diabetes
- You have been diagnosed with prediabetes and have not been retested in the past year
- You are pregnant; gestational diabetes screening is standard and should not be delayed
- Your A1C is above your personal target and your current management plan needs review
Frequently Asked Questions
What is a normal result on the diabetes risk calculator?
A score of 0 to 4 indicates low risk, meaning few standard risk factors are currently present. A score of 5 to 8 is moderate, 9 to 12 is high, and 13 or above is very high. Any score of 5 or above is a reason to discuss formal screening with your doctor, since the tool identifies risk factors, not a diagnosis.
Can prediabetes be reversed?
Yes. The CDC-backed Diabetes Prevention Program found that lifestyle changes, specifically modest weight loss of 5 to 7 percent of body weight and 150 minutes of moderate exercise per week, reverse prediabetes to normal glucose levels in more than half of cases. Early action is the single most effective lever available.
What A1C level means I have diabetes?
An A1C of 6.5% or higher on two separate tests confirms a diabetes diagnosis, per the American Diabetes Association. A single result of 6.5% or higher is also confirmatory if classic symptoms are present. Prediabetes is 5.7 to 6.4 percent; below 5.7 percent is normal.
How accurate is this diabetes risk calculator?
This tool uses the same validated risk factors as the ADA and CDC screening tools. It is a screening instrument, not a diagnostic test. Its purpose is to identify who should seek formal blood testing. A moderate or high score should be confirmed with an HbA1c or fasting plasma glucose test ordered by a clinician.
What is the difference between A1C and fasting blood sugar?
Fasting blood glucose measures your blood sugar at a single point in time after at least 8 hours without eating. A1C measures average blood glucose over the past 2 to 3 months. A1C is less affected by day-to-day variation and does not require fasting, making it more practical for routine monitoring.
How often should I check my diabetes risk?
The American Diabetes Association recommends screening for all adults starting at age 35, and earlier if risk factors are present. If results are normal, repeat every 3 years. With prediabetes, retest every 1 to 2 years. Annual screening may be appropriate if you have multiple risk factors.
Does prediabetes always progress to type 2 diabetes?
No. Without intervention, about 15 to 30 percent of people with prediabetes develop type 2 diabetes within 5 years. With structured lifestyle changes per the Diabetes Prevention Program, more than half reverse to normal blood sugar levels. The window for reversal is real and worth acting on.
Is this the same as the official ADA diabetes risk test?
This calculator uses the same core risk factors as the ADA and CDC screening tools, adapted as a digital assessment. Neither this tool nor the ADA official test replaces formal diagnosis; both are designed to identify who should seek confirmatory blood testing from a clinician.
Sources
- American Diabetes Association: Type 2 Diabetes Risk Test
- CDC: Prediabetes Risk Test
- NIDDK: Risk Factors for Type 2 Diabetes
- Nathan DM et al. Translating the A1C Assay into Estimated Average Glucose Values. Diabetes Care. 2008;31(8):1473-1478.
- CDC: National Diabetes Prevention Program
- Knowler WC et al. Reduction in Incidence of Type 2 Diabetes with Lifestyle Intervention or Metformin. NEJM. 2002.
Medical Disclaimer: This tool is for general educational purposes only and is not a diagnostic test. Diabetes diagnosis requires confirmed lab tests under medical supervision. Risk assessment is based on validated population-level screening factors but cannot replace a personalized medical evaluation. See our full Medical Disclaimer and Editorial Policy.
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