A1C to Average Glucose Calculator
Convert HbA1c to estimated average glucose.
Your result
An HbA1c of 5.7–6.4% is in the prediabetes range.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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HbA1c Explained: What Your Result Means
A1C shows average blood sugar over about three months.
Diabetes & Blood SugarPrediabetes: Can You Reverse It?
Lifestyle changes can cut the risk of progressing to type 2 diabetes by more than half.
Diabetes & Blood SugarFasting Blood Sugar Ranges and Units
Normal, prediabetes and diabetes ranges in mg/dL and mmol/L.
Frequently asked questions
What does the A1C to Average Glucose Calculator do?
Convert HbA1c to estimated average glucose. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: what does my a1c mean; a1c to blood sugar; prediabetes check; hba1c average glucose.