A1c Chart: Simple A1c to Blood Sugar Conversion (eAG) Explained

24 Aug 2025

A1c Chart: Simple A1c to Blood Sugar Conversion (eAG) Explained Understanding your A1c level is crucial for managing diabetes or prediabetes. An A1c t...

A1c Chart: Simple A1c to Blood Sugar Conversion (eAG) Explained

Understanding your A1c level is crucial for managing diabetes or prediabetes. An A1c test provides a snapshot of your average blood sugar levels over the past 2-3 months. This article explains the A1c chart, how to convert A1c to estimated average glucose (eAG), and what those numbers mean for your health. We'll cover everything you need to know to interpret your A1c results and work with your doctor to achieve optimal blood sugar control.

What is A1c and Why is it Important?

The A1c test, also known as the hemoglobin A1c test, measures the percentage of your red blood cells that have glucose attached to them. The higher your blood sugar levels have been over time, the more glucose will bind to your hemoglobin. Unlike a daily blood sugar test that provides a current reading, the A1c test gives a longer-term view of your blood sugar control.

It's important because it helps:

  • Diagnose Prediabetes and Diabetes: A1c levels can indicate if you are at risk for or have already developed these conditions.
  • Monitor Diabetes Management: For people with diabetes, the A1c test helps track how well their treatment plan is working.
  • Reduce Long-Term Complications: Maintaining a healthy A1c level reduces the risk of complications associated with diabetes, such as nerve damage, kidney disease, and heart disease.

Understanding the A1c Chart

The A1c chart provides a range of values that correspond to different stages of blood sugar control:

  • Normal: Below 5.7%
  • Prediabetes: 5.7% to 6.4%
  • Diabetes: 6.5% or higher

It's important to remember that these are general guidelines, and your individual target A1c may vary depending on your age, overall health, and other factors. Always consult with your healthcare provider to determine your personal A1c goals.

Related reading: Decoding Your Blood Sugar Test From Impaired Fasting Glucose To Diabetes

A1c to eAG Conversion: Making Sense of the Numbers

While A1c is expressed as a percentage, it can be helpful to convert it to an estimated average glucose (eAG), which is measured in mg/dL. This provides a more intuitive understanding of your average blood sugar levels. The following table illustrates the conversion:

A1c (%) eAG (mg/dL) eAG (mmol/L)
6.0 126 7.0
6.5 140 7.8
7.0 154 8.6
7.5 169 9.4
8.0 183 10.2
8.5 197 10.9
9.0 212 11.8

Note: These are approximate conversions. Individual results may vary.

Related reading: The Dangers Of Hyperglycemia What Happens When Your Blood Sugar Stays High

Why is the eAG important? It directly relates the A1c value to the more commonly understood blood glucose measurements. Seeing that an A1c of 7% equates to an average blood glucose of 154 mg/dL makes it easier to understand the overall picture and the impact of dietary and lifestyle choices.

Factors Affecting A1c Results

While the A1c test is generally reliable, several factors can influence the results:

  • Anemia and Other Blood Disorders: Conditions that affect red blood cells can interfere with the test.
  • Kidney Disease: Kidney disease can alter the lifespan of red blood cells.
  • Certain Medications: Some medications can affect A1c levels.
  • Ethnicity: Some studies suggest that certain ethnicities may have different relationships between A1c and average glucose.
  • Pregnancy: A1c goals often change during pregnancy.

If you have any of these conditions, discuss them with your doctor, as they may need to use alternative methods for monitoring your blood sugar.

Improving Your A1c Level

Related reading: How To Lower Postprandial Blood Sugar 8 Tips For Managing Levels After You Eat

If your A1c level is higher than your target range, there are several steps you can take to improve it:

  1. Dietary Changes: Focus on a balanced diet that is low in processed foods, sugary drinks, and unhealthy fats. Increase your intake of fruits, vegetables, and whole grains.
  2. Regular Exercise: Aim for at least 30 minutes of moderate-intensity exercise most days of the week. Regular physical activity helps your body use insulin more effectively.
  3. Medication Adherence: If you are prescribed medication for diabetes, take it as directed by your doctor.
  4. Monitor Blood Sugar Regularly: Check your blood sugar levels regularly to understand how your body responds to different foods and activities. This provides valuable data for fine-tuning your diabetes management plan.
  5. Work with a Healthcare Team: Consult with your doctor, a registered dietitian, and a certified diabetes educator to develop a personalized plan that meets your needs.

The Future of A1c Testing

Advancements in technology are continuously refining A1c testing. Researchers are working on more accurate and reliable methods, and exploring ways to personalize A1c targets based on individual factors. Continuous glucose monitors (CGMs) are also playing an increasingly important role, providing real-time glucose data that complements A1c testing for more comprehensive diabetes management.

Conclusion

Understanding your A1c chart and the A1c to eAG conversion is essential for managing your blood sugar levels. By working with your healthcare team, making healthy lifestyle choices, and regularly monitoring your blood sugar, you can achieve and maintain a healthy A1c level, reducing your risk of diabetes-related complications. Remember, consistent effort and informed decisions are key to long-term success in diabetes management.