What is the eAG formula?

The ADA formula is: eAG (mg/dL) = 28.7 x HbA1c(%) - 46.7. To convert to mmol/L, divide by 18. For example, HbA1c 7% = eAG 154 mg/dL = 8.6 mmol/L.

Why is eAG useful for patients?

eAG translates HbA1c into the same units patients see on their glucose meter (mg/dL or mmol/L), making it more relatable and intuitive than the percentage value of HbA1c.

What conditions make HbA1c unreliable?

HbA1c is unreliable in hemolytic anemia, iron deficiency anemia, thalassemia, sickle cell disease, blood transfusions, and conditions affecting red blood cell lifespan. In these cases, fructosamine or CGM-derived GMI may be preferred.

HbA1c to Estimated Average Glucose

Convert HbA1c to estimated average glucose using ADA formula: eAG (mg/dL) = 28.7 x HbA1c - 46.7. HbA1c 7% = eAG 154 mg/dL.

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Frequently Asked Questions

What is the eAG formula?

Why is eAG useful for patients?

What conditions make HbA1c unreliable?