eAG to A1C Calculator

- May 09, 2025
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Convert between estimated Average Glucose (eAG) and Haemoglobin A1C values. This calculator helps patients and healthcare providers translate between blood glucose measurements.

Conversion Calculator

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About A1C and eAG

Haemoglobin A1C (HbA1c) is a measure of a person's average blood glucose levels over the past 2-3 months. Estimated Average Glucose (eAG) is a way to translate A1C results into the same units used for daily blood glucose monitoring.

Understanding the Units
  • A1C: Measured as a percentage representing the amount of haemoglobin with glucose attached.
  • eAG: Can be expressed as mg/dL (used in the US) or mmol/L (used internationally).
  • Conversion: 1 mmol/L = 18 mg/dL
Common Target Ranges
  • Non-diabetic: A1C below 5.7% (eAG below 117 mg/dL or 6.5 mmol/L)
  • Prediabetes: A1C 5.7-6.4% (eAG 117-140 mg/dL or 6.5-7.8 mmol/L)
  • Diabetes: A1C 6.5% or higher (eAG 140 mg/dL or higher, or 7.8 mmol/L or higher)
  • Target for many adults with diabetes: A1C below 7.0% (eAG below 154 mg/dL or 8.6 mmol/L)
Important Notes
  • Individual target ranges should be determined by healthcare providers.
  • The correlation between A1C and eAG can vary slightly between individuals.
  • Certain medical conditions can affect the accuracy of A1C measurements (e.g., haemoglobinopathies, anaemia, recent blood loss).
  • This calculator uses the formula derived from the ADAG study published in 2008.

What Is the eAG to A1C Calculator?

The eAG to A1C Calculator is a useful tool for converting Estimated Average Glucose (eAG) values to Hemoglobin A1C (A1C) percentages and vice versa. This calculator helps people with Diabetes, as well as their healthcare providers, easily understand and translate blood glucose measurements. By using this calculator, users can assess their average blood glucose levels over time, which is critical for managing diabetes effectively.

Why Use This Calculator?

This calculator simplifies the process of understanding glucose levels. It provides a straightforward way for users to see how their eAG relates to their A1C. This can help in tracking overall Health and making informed decisions about diabetes management. Here are some benefits:

  • Easy conversion between eAG and A1C values.
  • Helps to understand long-term glucose control.
  • Useful for both patients and healthcare providers.

How Does the Calculator Work?

The eAG to A1C Calculator works by applying a specific formula to convert eAG into A1C and vice versa. When you input your eAG in mg/dL or mmol/L, the calculator will provide the corresponding A1C percentage. Alternatively, if you start with an A1C value, it will calculate the equivalent eAG. This ensures you get accurate results tailored to your needs.

Key Features of the Calculator

This calculator includes several helpful features to improve user experience. You can select the conversion direction, input your glucose values comfortably, and adjust decimal places for more precise results. Here’s what you can expect:

  • Radio buttons for choosing conversion direction.
  • Input fields for both eAG and A1C values.
  • Options to show the conversion formula and adjust decimal places.

Understanding eAG and A1C

Estimated Average Glucose (eAG) and Hemoglobin A1C (A1C) are key measurements in diabetes management. A1C reflects average blood glucose levels over the past two to three months, while eAG translates A1C results into familiar daily blood glucose units. Knowing both measures helps in better monitoring and control of diabetes, leading to improved health outcomes.

Conversion Formula Explained

The calculator uses a specific formula derived from the ADAG study to make conversions. For A1C, the formula is A1C (%) = (eAG (mg/dL) + 46.7) ÷ 28.7. This connection between A1C and eAG helps clarify how one affects the Other. Understanding this formula can aid in grasping how changes in glucose levels impact A1C readings over time.

Target Ranges for A1C and eAG

Knowing the target ranges for A1C and eAG can help individuals manage their diabetes better. Here are some common target ranges:

  • Non-diabetic: A1C below 5.7% (eAG below 117 mg/dL).
  • Prediabetes: A1C between 5.7-6.4% (eAG 117-140 mg/dL).
  • Diabetes: A1C of 6.5% or higher (eAG 140 mg/dL or higher).

Important Considerations

When using the eAG to A1C Calculator, it’s essential to keep in mind that individual results may vary. Some medical conditions can affect the accuracy of A1C measurements. Therefore, it’s advisable to discuss results with a healthcare provider for a clearer understanding of your health status. Always remember that personal target ranges should be based on specific medical advice.