What does your A1C mean?
Convert between A1C and blood sugar instantly
Medical Disclaimer: This tool provides general educational estimates. Always consult your prescribing physician or healthcare provider before making medication changes or interpreting results from population-based models.
Frequently Asked Questions
Below 5.7% is normal. 5.7-6.4% indicates prediabetes. 6.5% or higher on two separate tests indicates diabetes, according to the American Diabetes Association.
At least twice a year if diabetes is well-controlled, every 3 months if treatment changed or goals not met (ADA recommendation).
Yes. A1C can be affected by hemoglobin variants, iron deficiency anemia, recent blood transfusions, and kidney disease.
Estimated Average Glucose (eAG) is derived from your A1C and represents your average blood sugar over 2-3 months. Formula: eAG (mg/dL) = 28.7 × A1C - 46.7.
Meaningful changes take 2-3 months. A drop of 0.5-1.0% per quarter is good progress with lifestyle modifications alone.
Methodology
This calculator uses the DCCT/ADAG formula: eAG (mg/dL) = 28.7 × A1C - 46.7. To convert mg/dL to mmol/L, divide by 18. A1C reflects average blood glucose over the preceding 2-3 months by measuring the percentage of glycated hemoglobin.
A1C to blood sugar conversion: eAG (mg/dL) = 28.7 × A1C - 46.7. A1C below 5.7% is normal, 5.7-6.4% is prediabetes, 6.5%+ is diabetes (ADA). A1C of 7% = 154 mg/dL average. A1C reflects 2-3 months of blood sugar control.
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