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From A1c to eAG: How to Convert and Understand Your Estimated Average Glucose

04 Sep 2025 by H. Keels S. Jorn, M.D.

From A1c to eAG: How to Convert and Understand Your Estimated Average Glucose

Understanding your blood sugar levels is crucial, especially if you're managing diabetes. Two key metrics used in this context are A1c and eAG (estimated Average Glucose). While A1c provides a snapshot of your average blood sugar over the past 2-3 months, eAG presents that same data in a more familiar glucose measurement (mg/dL or mmol/L), which many people find easier to interpret. This article will explain how to convert A1c to eAG and what this information means for your health.

What is A1c?

A1c, also known as hemoglobin A1c, is a blood test that measures your average blood sugar level over the past 2-3 months. It works by measuring the percentage of your red blood cells that have glucose attached to them (glycated hemoglobin). The higher your average blood sugar levels, the more hemoglobin will be glycated, resulting in a higher A1c percentage.

  • Why is A1c Important? A1c is a vital tool for diagnosing prediabetes and diabetes and for monitoring how well your diabetes management plan is working. It provides a longer-term view of blood sugar control compared to daily finger-stick glucose tests.
  • Normal A1c Range: For people without diabetes, a normal A1c is typically below 5.7%.
  • A1c for Prediabetes: An A1c between 5.7% and 6.4% indicates prediabetes.
  • A1c for Diabetes: An A1c of 6.5% or higher indicates diabetes.

What is eAG (Estimated Average Glucose)?

eAG (estimated Average Glucose) is an estimate of your average blood sugar level in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L), calculated based on your A1c result. It's designed to provide a more relatable and understandable measure of your blood sugar control. Many people who regularly check their blood sugar with a glucose meter find the eAG easier to comprehend than the A1c percentage.

  • Why is eAG Important? eAG helps you visualize your average blood sugar in a format similar to what you see on your glucose meter, making it easier to connect your A1c results with your day-to-day glucose readings. It enhances understanding and can motivate better blood sugar management.

How to Convert A1c to eAG

The relationship between A1c and eAG is based on a mathematical formula. Here's the most common formula to convert A1c to eAG (mg/dL): The A1C Chart Explained Converting A1C To Eag And Blood Sugar Levels

eAG (mg/dL) = (28.7 x A1c) - 46.7

For eAG in mmol/L, use the following formula:

eAG (mmol/L) = (1.59 x A1c) - 2.59

Here's a handy reference table:

A1c (%) eAG (mg/dL) eAG (mmol/L)
6.0 126 7.0
7.0 154 8.6
8.0 183 10.2
9.0 212 11.8
10.0 240 13.4
11.0 269 14.9
12.0 298 16.5

Note: These are approximate conversions, and individual results may vary.

Understanding Your Estimated Average Glucose (eAG)

Once you've converted your A1c to eAG, you can better understand what it means in terms of your daily blood sugar management.

  • Target eAG Levels: The target eAG level varies depending on individual circumstances and the recommendations of your healthcare provider. However, a general guideline is to aim for an eAG below 154 mg/dL (8.6 mmol/L), which corresponds to an A1c of 7%. What Is A Hemoglobin A1C Test Your Guide To A1C Levels And Eag

  • Interpreting Your eAG: If your eAG is consistently higher than your target, it indicates that your average blood sugar levels are elevated. This could mean that your current treatment plan needs adjustments, such as changes to your diet, exercise routine, or medication. Conversely, a very low eAG might signal a risk of hypoglycemia (low blood sugar).

Practical Steps to Manage Your Blood Sugar Levels

Improving your A1c and eAG involves a multi-faceted approach:

  1. Regular Blood Sugar Monitoring: Use a glucose meter to check your blood sugar regularly, as recommended by your doctor. This helps you understand how different foods, activities, and medications affect your levels.
  2. Healthy Diet: Work with a registered dietitian to create a meal plan that focuses on balanced meals, portion control, and limiting sugary and processed foods.
  3. Regular Exercise: Aim for at least 150 minutes of moderate-intensity exercise per week. Physical activity helps improve insulin sensitivity and lowers blood sugar levels.
  4. Medication Adherence: Take your diabetes medications as prescribed by your doctor. If you have any concerns about your medication, discuss them with your healthcare provider.
  5. Stress Management: Practice stress-reduction techniques such as yoga, meditation, or deep breathing exercises. Stress can impact blood sugar levels.
  6. Regular Check-ups: Schedule regular appointments with your doctor and diabetes educator to monitor your progress and make any necessary adjustments to your treatment plan.

The Importance of Working with Your Healthcare Provider

While converting A1c to eAG can provide a clearer picture of your blood sugar control, it's essential to discuss your results and any concerns with your healthcare provider. They can provide personalized recommendations based on your individual health needs and help you develop a comprehensive diabetes management plan. Don’t make changes to your medication or treatment plan without consulting your doctor. Your healthcare team is the best resource for making informed decisions about your health. What Is Postprandial Blood Sugar And Why It Matters After You Eat

Conclusion

Understanding the relationship between A1c and eAG empowers you to better manage your blood sugar levels. By converting your A1c to eAG, you can gain a clearer picture of your average blood sugar control and make informed decisions about your diet, exercise, and medication. Remember that managing diabetes requires a proactive and collaborative approach. Work closely with your healthcare provider to achieve your target A1c and eAG levels and improve your overall health and well-being. Focusing on regular monitoring, a healthy lifestyle, and adherence to your prescribed treatment plan are key to long-term success in diabetes management.

References and Further Reading