A1C and Blood Sugar: The Complete Conversion Chart for Diabetics
05 Sep 2025 Sergey Turchin, M.D.
A1C and Blood Sugar: The Complete Conversion Chart for Diabetics
Managing diabetes effectively requires understanding various metrics, most notably A1C levels and blood sugar levels. These two measurements offer different but complementary insights into your glycemic control. Understanding their relationship and how to convert between them is crucial for informed diabetes management. This comprehensive guide provides a complete A1C and blood sugar conversion chart, explains the significance of each measurement, and offers practical advice for using this information to improve your health.
Why Understanding the Relationship Matters
- Informed Decision-Making: Knowing how A1C and blood sugar relate enables better decisions regarding diet, exercise, and medication adjustments.
- Improved Diabetes Management: Consistent monitoring and understanding of these metrics contribute to more effective long-term glycemic control.
- Empowered Self-Care: Education about A1C and blood sugar empowers individuals to take a proactive role in their health management.
Understanding A1C and Blood Sugar Levels
Before diving into the conversion chart, it's essential to understand what A1C and blood sugar levels represent.
What is A1C?
A1C (Glycated Hemoglobin) is a blood test that provides an average of your blood sugar levels over the past 2-3 months. It measures the percentage of your hemoglobin (the protein in red blood cells that carries oxygen) that has glucose attached to it. The higher your blood sugar levels, the more glucose will be attached to your hemoglobin.
- Why A1C Matters: A1C offers a long-term view of blood sugar control, unlike a single blood sugar reading, which only captures a snapshot at that moment.
- Target A1C Levels: The American Diabetes Association (ADA) generally recommends an A1C target of less than 7% for most non-pregnant adults with diabetes. However, individualized goals should be determined in consultation with your healthcare provider.
What is Blood Sugar?
Blood sugar (glucose) refers to the concentration of glucose in your blood. Blood sugar levels fluctuate throughout the day based on food intake, physical activity, stress, and medication.
- Why Blood Sugar Matters: Monitoring blood sugar levels allows you to see how your body responds to different factors and helps you make immediate adjustments to manage your diabetes.
- Target Blood Sugar Levels: General target ranges for blood sugar levels, according to the ADA, are:
- Before meals: 80-130 mg/dL
- Two hours after starting a meal: Less than 180 mg/dL
A1C vs. Blood Sugar: Key Differences
| Feature | A1C | Blood Sugar | | ----------------- | ----------------------------------------- | ------------------------------------------ | | Measurement | Average blood sugar over 2-3 months | Blood sugar level at a specific moment | | Frequency | Typically tested 2-4 times per year | Can be tested multiple times per day | | Information | Long-term glycemic control | Immediate impact of food, activity, etc. | | Usefulness | Assessing overall diabetes management | Making daily adjustments to manage diabetes |
The A1C to Blood Sugar Conversion Chart
The following chart provides a handy reference for converting between A1C percentages and estimated average glucose (eAG) levels in both mg/dL and mmol/L.
| 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 | | 9.5 | 226 | 12.6 | | 10.0 | 240 | 13.4 | | 10.5 | 255 | 14.2 | | 11.0 | 269 | 14.9 | | 11.5 | 283 | 15.7 | | 12.0 | 298 | 16.5 |
How to Use the Chart
- Find Your A1C: Locate your A1C percentage in the first column.
- Determine Your eAG: Read across the row to find the corresponding estimated average glucose (eAG) in either mg/dL or mmol/L.
- Interpret the Results: Compare your eAG to target blood sugar ranges to assess your glycemic control.
Example:
If your A1C is 7.0%, your estimated average glucose is 154 mg/dL (8.6 mmol/L).
Converting A1C to eAG: Formulas
For more precise calculations, you can use the following formulas:
- eAG (mg/dL) = (28.7 x A1C) - 46.7
- eAG (mmol/L) = (1.59 x A1C) - 2.59
Example:
If your A1C is 7.3%, the calculation would be:
- eAG (mg/dL) = (28.7 x 7.3) - 46.7 = 163.01 mg/dL
- eAG (mmol/L) = (1.59 x 7.3) - 2.59 = 9.01 mmol/L
Practical Applications and Tips
Understanding the conversion between A1C and blood sugar can be incredibly useful in managing your diabetes. Here are some practical ways to apply this knowledge:
1. Monitoring and Adjusting Your Diabetes Management Plan
- Regular A1C Testing: Work with your healthcare provider to schedule regular A1C tests, typically every 3-6 months, depending on your diabetes control and treatment plan.
- Comparing A1C and Blood Sugar Levels: Use the conversion chart to understand how your A1C relates to your daily blood sugar readings. If your A1C is higher than your target, evaluate your blood sugar logs to identify patterns and areas for improvement.
- Adjusting Your Plan: Based on these insights, work with your healthcare team to adjust your diet, exercise, or medication regimen.
2. Setting Realistic Goals
- Establish Target Ranges: In consultation with your healthcare provider, set individualized target ranges for both your A1C and daily blood sugar levels.
- Break Down Goals: Use the conversion chart to translate your A1C goal into an estimated average glucose level. This can help you better understand the daily blood sugar targets you need to achieve to reach your A1C goal.
3. Improving Communication with Your Healthcare Provider
- Provide Comprehensive Information: Share both your A1C results and blood sugar logs with your healthcare provider.
- Ask Informed Questions: Use your understanding of A1C and blood sugar to ask specific, informed questions about your diabetes management plan.
4. Lifestyle Modifications
- Dietary Changes: Monitor how different foods affect your blood sugar levels. The conversion chart can help you understand how these short-term fluctuations impact your long-term A1C.
- Exercise: Track how physical activity influences your blood sugar and A1C levels. Regular exercise can help lower both.
- Stress Management: Understand the impact of stress on blood sugar and implement strategies to manage it effectively.
5. Using Technology and Tools
- Continuous Glucose Monitors (CGMs): CGMs provide real-time blood sugar readings and can calculate estimated A1C levels.
- Diabetes Management Apps: Many apps allow you to track your blood sugar levels, A1C results, diet, exercise, and medications, making it easier to manage your diabetes comprehensively.
Factors Affecting A1C and Blood Sugar
Several factors can influence both A1C and blood sugar levels. Being aware of these factors is essential for accurate interpretation and effective management. The Connection Between Blood Sugar And Weight Loss You Can T Ignore
Factors Affecting A1C
- Age: A1C levels tend to increase with age.
- Ethnicity: Certain ethnic groups may have slightly different A1C levels.
- Anemia and Hemoglobin Variants: Conditions affecting red blood cells can impact A1C accuracy.
- Kidney Disease: Kidney disease can affect A1C levels.
Factors Affecting Blood Sugar
- Diet: Carbohydrate intake, portion sizes, and meal timing significantly impact blood sugar.
- Physical Activity: Exercise can lower blood sugar levels.
- Stress: Stress hormones can raise blood sugar.
- Medications: Insulin and other diabetes medications directly affect blood sugar levels.
- Illness: Infections and illnesses can increase blood sugar.
- Hydration: Dehydration can affect blood sugar concentrations.
Common Misconceptions About A1C and Blood Sugar
It's essential to address some common misconceptions to ensure accurate understanding and effective diabetes management. The Ultimate Diabetic Diet Plan For Controlling Glucose Levels
- Misconception 1: A1C is a substitute for daily blood sugar monitoring.
- Reality: A1C provides an average over time, while daily monitoring provides immediate insights. Both are essential.
- Misconception 2: As long as my A1C is in the target range, my blood sugar is always well-controlled.
- Reality: A1C can be within the target range even with significant fluctuations in daily blood sugar levels. Consistent monitoring is crucial.
- Misconception 3: A1C and blood sugar levels are only important for people with diabetes.
- Reality: Monitoring blood sugar and understanding A1C can also be beneficial for people at risk of developing diabetes or those with prediabetes.
Case Studies and Examples
To illustrate the practical application of A1C and blood sugar conversion, let's consider a few case studies. What Does Your A1C Blood Sugar Level Really Mean For Your Health
Case Study 1: Managing Type 1 Diabetes
- Background: Sarah, a 35-year-old with type 1 diabetes, uses an insulin pump and checks her blood sugar multiple times a day. Her recent A1C was 7.8%.
- Analysis: Using the conversion chart, Sarah's eAG is approximately 175 mg/dL. She reviews her blood sugar logs and identifies that her blood sugar often spikes after meals.
- Action: Sarah works with her healthcare provider to adjust her insulin bolus settings for meals and focuses on balancing her carbohydrate intake.
Case Study 2: Managing Type 2 Diabetes
- Background: John, a 60-year-old with type 2 diabetes, manages his condition with diet, exercise, and oral medications. His A1C is consistently around 8.5%.
- Analysis: John's eAG is approximately 197 mg/dL. He realizes that his morning blood sugar levels are consistently high.
- Action: John incorporates a morning walk into his routine and adjusts his evening meal to reduce carbohydrate content. He also discusses with his doctor whether a change in medication is needed.
Case Study 3: Prediabetes Management
- Background: Emily, a 45-year-old with prediabetes, is working to prevent the onset of type 2 diabetes. Her A1C is 6.2%.
- Analysis: Emily's eAG is approximately 133 mg/dL. She aims to lower her A1C to below 5.7%.
- Action: Emily adopts a low-carb diet, increases her physical activity, and monitors her blood sugar levels regularly to track her progress.
The Future of Diabetes Management: Technological Advancements
The landscape of diabetes management is rapidly evolving with technological advancements that offer more precise and convenient ways to monitor and control blood sugar levels.

Continuous Glucose Monitoring (CGM) Systems
- Real-Time Data: CGMs provide continuous, real-time blood sugar readings, alerting users to highs and lows.
- Trend Analysis: CGMs can track blood sugar trends, helping users understand how their levels change throughout the day.
- Integration with Insulin Pumps: Some CGMs are integrated with insulin pumps, allowing for automated insulin delivery.
Artificial Pancreas Systems
- Automated Insulin Delivery: Artificial pancreas systems combine CGMs and insulin pumps to automatically adjust insulin delivery based on real-time blood sugar levels.
- Improved Glycemic Control: These systems can significantly improve glycemic control and reduce the burden of diabetes management.
Telehealth and Remote Monitoring
- Remote Consultations: Telehealth allows for remote consultations with healthcare providers, improving access to care.
- Remote Monitoring: Healthcare providers can remotely monitor patients' blood sugar levels and provide timely interventions.
Smart Insulin Pens
- Digital Tracking: Smart insulin pens track insulin doses and timing, providing valuable data for diabetes management.
- Integration with Apps: Many smart insulin pens integrate with mobile apps, making it easier to monitor insulin use and blood sugar levels.
Conclusion
Understanding the relationship between A1C and blood sugar is a fundamental aspect of effective diabetes management. The A1C to blood sugar conversion chart, along with the insights provided in this guide, empowers individuals with diabetes to make informed decisions, set realistic goals, and improve communication with their healthcare providers. By combining this knowledge with regular monitoring, lifestyle modifications, and technological advancements, you can achieve better glycemic control and live a healthier life. Remember, managing diabetes is a continuous journey, and staying informed and proactive is key to success.
References and Further Reading
- fasting blood sugar levels what do your numbers really mean pcO7Fb
- decoding your blood sugar chart from normal to prediabetes range mnDUvn
- what s a normal blood sugar level after eating postprandial guide Aq0UPh
- is my a1c blood sugar goal right for me a doctor explains QXotxK
- managing blood sugar a beginner s guide to testing diet and health dt20XE