A1c Chart Explained: How to Convert Your A1c to Average Blood Sugar

23 Aug 2025

A1c Chart Explained: How to Convert Your A1c to Average Blood Sugar Understanding your A1c level is crucial if you're managing diabetes or prediabetes...

A1c Chart Explained: How to Convert Your A1c to Average Blood Sugar

Understanding your A1c level is crucial if you're managing diabetes or prediabetes. This simple blood test provides a snapshot of your average blood sugar levels over the past 2-3 months. But what does that number really mean? How can you convert your A1c to an estimated average glucose (eAG) reading? This article breaks down the A1c chart, explains how the conversion works, and offers practical tips for managing your blood sugar levels.

What is the A1c Test?

The A1c test, also known as the glycated hemoglobin test, measures the percentage of your hemoglobin (a protein in red blood cells that carries oxygen) that has sugar (glucose) attached to it. The higher your blood sugar levels over time, the more glucose will bind to your hemoglobin.

Unlike a finger-prick blood sugar test which gives you a reading at a single moment in time, the A1c test provides a broader picture of your blood sugar control over several weeks. This makes it a valuable tool for diagnosing and managing diabetes.

Why is A1c Important?

Monitoring your A1c level is essential for several reasons:

  • Diagnosis of Diabetes and Prediabetes: An A1c test can help your doctor determine if you have diabetes or prediabetes.
  • Management of Existing Diabetes: Regular A1c testing allows you and your healthcare team to assess how well your current treatment plan is working and make necessary adjustments.
  • Prevention of Complications: Maintaining good blood sugar control, reflected in a healthy A1c level, can significantly reduce the risk of long-term complications associated with diabetes, such as nerve damage, kidney disease, eye damage, and heart disease.

Understanding the A1c Chart: Goals and Ranges

The American Diabetes Association (ADA) recommends the following A1c targets for most people with diabetes:

Related reading: The Ultimate A1C Blood Sugar Chart What Your Results Really Mean

  • Target A1c: Less than 7%

However, individual targets may vary based on age, overall health, and other factors. Always discuss your personal A1c goals with your doctor.

Here’s a general guideline for A1c ranges and what they indicate:

Related reading: Prediabetes And Blood Sugar Your Guide To Taking Control

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

Converting A1c to Average Blood Sugar (eAG): The Chart

The A1c percentage can be converted to an estimated average glucose (eAG) level, which is reported in mg/dL (milligrams per deciliter). This allows you to relate your A1c result to the blood sugar readings you may take at home with a glucose meter.

Here's a simplified A1c to average blood sugar chart. For more detailed conversion, consult online resources or your healthcare provider:

A1c (%) Estimated Average Glucose (eAG) mg/dL Estimated Average Glucose (eAG) mmol/L
6% 126 7.0
7% 154 8.5
8% 183 10.1
9% 212 11.8
10% 240 13.3
11% 269 14.9
12% 298 16.5

Remember: this chart provides estimates. Individual results can vary.

The general formula for estimating your eAG is:

  • eAG (mg/dL) = (28.7 x A1c) - 46.7
  • eAG (mmol/L) = (1.59 x A1c) - 2.59

Factors That Can Affect A1c Accuracy

While the A1c test is generally accurate, certain conditions can affect the results. These include:

  • Anemia: Can lead to falsely low A1c levels.
  • Kidney Disease: Can affect red blood cell lifespan and influence A1c accuracy.
  • Hemoglobin Variants: Certain hemoglobin variants can interfere with the test.
  • Pregnancy: A1c levels may be lower during pregnancy.

Related reading: Creating A Diabetes Friendly Diet To Maintain A Normal Blood Sugar

It is important to inform your doctor of any health conditions or medications you are taking, as these may affect the accuracy of your A1c test.

Tips for Managing Your A1c Levels

Achieving and maintaining a healthy A1c level requires a multi-faceted approach:

  • Follow a Balanced Diet: Focus on whole, unprocessed foods, including fruits, vegetables, lean proteins, and whole grains. Limit sugary drinks, processed foods, and excessive amounts of carbohydrates. Work with a registered dietitian to create a meal plan that's right for you.
  • Engage in Regular Physical Activity: Aim for at least 150 minutes of moderate-intensity exercise per week. Exercise helps improve insulin sensitivity and lower blood sugar levels.
  • Monitor Your Blood Sugar Regularly: Checking your blood sugar levels at home allows you to track your progress and make necessary adjustments to your diet, exercise, or medication. Discuss the best testing schedule with your doctor.
  • Take Medications as Prescribed: If you are prescribed medication for diabetes, take it as directed by your doctor.
  • Manage Stress: Stress can raise blood sugar levels. Find healthy ways to manage stress, such as yoga, meditation, or spending time in nature.
  • Get Enough Sleep: Lack of sleep can negatively impact blood sugar control. Aim for 7-8 hours of quality sleep each night.
  • Work Closely with Your Healthcare Team: Regular check-ups with your doctor, certified diabetes educator, and other healthcare professionals are crucial for managing your diabetes and achieving your A1c goals.

Conclusion

Understanding your A1c test results and how they relate to your average blood sugar levels is an important step in managing diabetes or prediabetes. By utilizing the A1c chart, implementing healthy lifestyle changes, and working closely with your healthcare team, you can achieve and maintain optimal blood sugar control and reduce your risk of long-term complications. Remember to regularly monitor your A1c levels as directed by your doctor to ensure you are on the right track. This, combined with active self-management strategies, allows you to take charge of your health and improve your quality of life.