What is a Normal A1c Level? The Complete Chart Explained

23 Aug 2025

What is a Normal A1c Level? The Complete Chart Explained Understanding your A1c level is crucial for managing blood sugar, especially if you have diab...

What is a Normal A1c Level? The Complete Chart Explained

Understanding your A1c level is crucial for managing blood sugar, especially if you have diabetes or are at risk of developing it. This article breaks down what A1c is, what normal A1c levels are, and what the chart means for your overall health. Let's dive in!

What is A1c?

The A1c test, also known as the hemoglobin A1c test, is a blood test that provides an average measure of your blood sugar levels over the past 2 to 3 months. Unlike a fasting blood sugar test that shows your blood sugar level at a single point in time, the A1c test gives a broader, longer-term perspective.

Hemoglobin is a protein in red blood cells that carries oxygen. When glucose (sugar) in your blood attaches to hemoglobin, it becomes glycated. The higher your average blood sugar levels, the more hemoglobin becomes glycated. The A1c test measures the percentage of your hemoglobin that is glycated. This percentage reflects your average blood sugar level over the previous months.

Why is the A1c Test Important?

The A1c test is used to:

  • Diagnose prediabetes and diabetes: Helps in identifying if you're at risk or have already developed diabetes.
  • Monitor blood sugar control: Provides an ongoing assessment of how well your diabetes management plan is working.
  • Adjust treatment plans: Allows healthcare providers to make informed decisions about medication, diet, and exercise.

Maintaining normal A1c levels can significantly reduce the risk of complications associated with high blood sugar, such as:

  • Heart disease
  • Kidney disease
  • Nerve damage (neuropathy)
  • Eye damage (retinopathy)

Understanding the A1c Chart: Normal, Prediabetes, and Diabetes Ranges

Here’s a detailed look at what different A1c levels mean:

A1c Level Interpretation Average Blood Sugar (eAG)
Below 5.7% Normal ~114 mg/dL
5.7% - 6.4% Prediabetes ~117-137 mg/dL
6.5% or higher Diabetes ~140 mg/dL and higher
  • Normal A1c Level (Below 5.7%): An A1c level below 5.7% is considered normal. It indicates that your average blood sugar levels are within the healthy range. If you don't have diabetes or prediabetes, maintaining this level is ideal for long-term health. Achieving normal A1c levels can be accomplished through balanced nutrition, regular exercise, and stress management.
  • Prediabetes A1c Level (5.7% - 6.4%): An A1c level between 5.7% and 6.4% indicates prediabetes. This means your blood sugar levels are higher than normal, but not high enough to be diagnosed as diabetes. This is a critical stage where lifestyle changes, such as diet and exercise, can significantly lower your risk of developing type 2 diabetes. Monitoring your A1c level regularly and making proactive changes are essential during this phase.
  • Diabetes A1c Level (6.5% or Higher): An A1c level of 6.5% or higher indicates diabetes. This means that your average blood sugar levels are consistently elevated over the past 2-3 months. It's important to consult with a healthcare provider to develop a comprehensive management plan, which may include medication, diet changes, regular exercise, and consistent monitoring.

Factors Affecting A1c Levels

Related reading: Prediabetes Diagnosis Are Your Fasting Blood Sugar Levels Too High

Related reading: The Ultimate Blood Sugar Levels Chart By Age For Adults Amp Kids

While A1c levels are a reliable indicator of average blood sugar, some factors can affect the accuracy of the test:

  • Anemia: Certain types of anemia can lead to falsely lower A1c levels.
  • Hemoglobinopathies: Conditions affecting hemoglobin structure, such as sickle cell anemia or thalassemia, can interfere with the test.
  • Kidney Disease: Severe kidney disease can affect the results.
  • Pregnancy: Hormonal changes during pregnancy can alter A1c levels.

In such cases, your doctor may recommend other tests to assess blood sugar control.

Related reading: How To Stabilize Blood Sugar Throughout The Day Dietitian Approved Tips

How to Lower Your A1c Level

If your A1c level is higher than normal, here are strategies to help lower it:

  1. Dietary Changes:
    • Reduce Sugar Intake: Limit sugary drinks, processed foods, and desserts.
    • Increase Fiber Intake: Focus on whole grains, fruits, and vegetables.
    • Control Portion Sizes: Be mindful of how much you're eating to manage calorie intake.
  2. Regular Exercise:
    • Aerobic Exercise: Aim for at least 150 minutes of moderate-intensity exercise per week, such as brisk walking, jogging, or cycling.
    • Strength Training: Incorporate strength training exercises at least twice a week to improve insulin sensitivity.
  3. Medication:
    • Follow Prescriptions: Take medications as prescribed by your doctor.
    • Monitor Side Effects: Report any side effects to your healthcare provider promptly.
  4. Regular Monitoring:
    • Check Blood Sugar: Monitor your blood sugar levels regularly to understand how your body responds to food, exercise, and medication.
    • A1c Tests: Get your A1c tested as recommended by your doctor, usually every 3 to 6 months.
  5. Stress Management:
    • Practice Relaxation Techniques: Engage in activities like meditation, yoga, or deep breathing exercises to manage stress levels.
    • Ensure Adequate Sleep: Aim for 7-9 hours of quality sleep per night to improve blood sugar control.

Setting A1c Goals with Your Healthcare Provider

The target A1c level can vary depending on individual factors such as age, overall health, and the presence of other medical conditions. While the general recommendation for many adults with diabetes is an A1c level below 7%, your doctor may set a different goal tailored to your specific needs. Regular consultations with your healthcare provider are essential to adjust your treatment plan and ensure you're on track to achieving your A1c goals.

Conclusion

Understanding your A1c level is a key component in managing your blood sugar and overall health. Whether you're aiming for a normal A1c level, navigating prediabetes, or managing diabetes, proactive monitoring and lifestyle changes can make a significant difference. Work closely with your healthcare provider to develop a personalized plan that helps you achieve and maintain healthy blood sugar levels. By taking these steps, you can reduce the risk of diabetes-related complications and enjoy a healthier, more active life.