A1C to eAG Calculator
Convert your Hemoglobin A1C percentage to Estimated Average Glucose (eAG) to better understand your blood sugar management.
A1C Converter
Convert HbA1c to eAG
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Reference Ranges (A1C)
Healthy blood sugar control.
Heightened risk for developing diabetes.
Requires diagnosis and management.
Understanding A1C and Estimated Average Glucose (eAG)
The Hemoglobin A1c (HbA1c) test measures the percentage of your red blood cells that have sugar-coated hemoglobin. Because red blood cells live for about three months, the A1C test reflects your average blood glucose levels over the past 2 to 3 months. To make this percentage easier to understand on a day-to-day basis, healthcare professionals translate A1C into an estimated average glucose (eAG) number.
The Formula
The widely accepted formula developed by the ADAG (A1C-Derived Average Glucose) study group is:
eAG (mg/dL) = 28.7 × A1C − 46.7
To convert the result to mmol/L, divide the mg/dL value by 18.0182.
Interpreting Your A1C Results
The American Diabetes Association (ADA) provides the following guidelines for A1C percentages:
- Normal: Below 5.7%. This indicates healthy blood sugar control and a low risk for diabetes.
- Prediabetes: 5.7% to 6.4%. Individuals in this range are at a heightened risk for developing type 2 diabetes. Lifestyle modifications, such as improved diet and exercise, are highly recommended to prevent disease progression.
- Diabetes: 6.5% or higher on two separate tests indicates a diagnosis of diabetes.
Frequently Asked Questions
What is the difference between A1C and eAG?
A1C is given as a percentage representing sugar-coated hemoglobin over 3 months. eAG translates that percentage into the same mg/dL or mmol/L units you see on your daily glucose meter.
How often should I get an A1C test?
If you have diabetes, it is usually recommended 2 to 4 times a year depending on how well your blood sugar is controlled. If you do not have diabetes but are at risk, once a year or as advised by your doctor.
Can anemia affect my A1C results?
Yes, conditions that affect red blood cells, like iron-deficiency anemia or hemoglobin variants, can falsely elevate or lower A1C readings. In these cases, a fructosamine test may be used instead.
Is 6.0% A1C bad?
An A1C of 6.0% is in the prediabetes range. It indicates elevated risk for developing type 2 diabetes and suggests that lifestyle interventions should be considered.
How can I lower my A1C?
Lowering A1C involves consistent carbohydrate management, regular physical activity, weight loss if applicable, and taking prescribed diabetes medications as directed by a healthcare provider.
Medical Disclaimer: This calculator is for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider. Read full disclaimer →