eAG/A1C Conversion Calculator

What Is an eAG/A1C Conversion Calculator?

An eAG/A1C conversion calculator is a tool that helps you convert your HbA1c (glycated hemoglobin) percentage into an estimated average glucose (eAG) level, and vice versa. This conversion allows people with diabetes to better understand how their long-term glucose control translates into daily blood sugar readings.

Why eAG and A1C Are Important

HbA1c reflects your average blood sugar levels over the past 2 to 3 months. However, many people find it easier to interpret their diabetes control in terms of daily glucose values. The eAG provides a more relatable number by converting the A1C percentage into the same units used in daily glucose monitoring.

How the Conversion Works

The relationship between HbA1c and eAG is based on established clinical studies. The American Diabetes Association provides the following formula to convert A1C to eAG:

eAG (mg/dL) = (28.7 × A1C) − 46.7

If you have a glucose value and want to estimate the corresponding A1C, the reverse formula is used:

A1C (%) = (eAG + 46.7) ÷ 28.7

Reference Ranges

Category	eAG (mg/dL)	A1C (%)
Normal	70-126 mg/dL	4.0-5.6%
Pre-diabetes	126-154 mg/dL	5.7-6.4%
Diabetes	Above 154 mg/dL	6.5% or higher

Who Should Use This Calculator

People with diabetes tracking their long-term glucose control.
Healthcare providers explaining A1C results to patients.
Anyone wanting to better understand how their lab results translate to daily numbers.

Limitations of the Calculator

It provides an estimate and is not a substitute for medical advice.
Factors like anemia, pregnancy, and certain medical conditions can affect A1C accuracy.
Always consult your healthcare provider for personalized health decisions.

How to Use the eAG/A1C Conversion Calculator

The eAG/A1C conversion calculator makes it simple to translate between your average glucose readings and HbA1c percentage. Follow these easy steps to understand your diabetes control in both formats.

Step 1: Choose Which Value You Have

Decide whether you want to convert from estimated average glucose (eAG) to HbA1c or from HbA1c to eAG. The calculator allows you to enter either value.

Step 2: Enter Your Value

To convert eAG to A1C: Enter your average glucose value in the eAG field. You can select the unit (mg/dL or mmol/L).
To convert A1C to eAG: Enter your HbA1c percentage in the A1C field.

Step 3: View the Result

After entering your value, the calculator will automatically display the converted result. This helps you interpret how your lab results or daily glucose readings relate to each other.

Step 4: Understand the Reference Values

The reference table below the calculator shows the general classification of eAG and A1C results:

Range	eAG (mg/dL)	A1C (%)
Normal	70-126	4.0-5.6%
Pre-diabetes	126-154	5.7-6.4%
Diabetes	Above 154	6.5% and higher

Important Notes

The conversion uses standard clinical formulas recommended by diabetes associations.
Results are estimates and can vary based on individual health conditions.
Use these numbers as a guide and always consult your doctor for clinical decisions.

Example Conversions

Example 1: An A1C of 6.0% converts to an average glucose of approximately 126 mg/dL.
Example 2: An average glucose of 160 mg/dL converts to an A1C of roughly 7.2%.