Estimated Average Glucose Calculator

- May 09, 2025
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This calculator converts between HbA1c (A1C) values and Estimated Average Glucose (eAG). It helps patients and healthcare providers understand the relationship between A1C test results and average blood glucose levels over the past 2-3 months.

Conversion Calculator

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Display Options

Conversion Results

HbA1c (A1C)
7.0
%
eAG (mg/dL)
154
mg/dL
eAG (mmol/L)
8.6
mmol/L

Conversion Formula

A1C to eAG (mg/dL):
eAG (mg/dL) = (28.7 × A1C) - 46.7
eAG (mg/dL) to A1C:
A1C (%) = (eAG + 46.7) ÷ 28.7

This formula is based on the ADAG (A1C-Derived Average Glucose) study and is the standard used by the American Diabetes Association.

Interpretation of Results

An A1C of 7.0% indicates an estimated average glucose level of 154 mg/dL (8.6 mmol/L) over the past 2-3 months.

For most adults with diabetes, the American Diabetes Association suggests an A1C target of less than 7%, which corresponds to an estimated average glucose of less than 154 mg/dL (8.6 mmol/L).

A1C to eAG Reference Table

A1C (%) eAG (mg/dL) eAG (mmol/L)
5.0 97 5.4
5.5 111 6.2
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
11.0 269 14.9
12.0 298 16.5

About HbA1c and eAG

Hemoglobin A1c (HbA1c or A1C) measures the percentage of hemoglobin proteins in your blood that are coated with glucose. It reflects your average blood glucose levels over the past 2-3 months.

Why Use eAG?

Estimated Average Glucose (eAG) converts the A1C percentage into the same units used in daily blood glucose monitoring (mg/dL or mmol/L). This makes it easier for patients to understand the relationship between their A1C results and daily glucose readings.

Target A1C Levels
  • General Adults with Diabetes: Less than 7.0%
  • Without Significant Hypoglycaemia Risk: Around 6.5%
  • With History of Severe Hypoglycaemia, Limited Life Expectancy, or Multiple Comorbidities: Less than 8.0%
  • Non-Diabetic Reference Range: 4.0% to 5.6%

Individual A1C targets should be personalised based on age, comorbidities, diabetes duration, hypoglycaemia risk, and patient preferences.

Limitations

Some conditions may affect A1C results, including anaemia, certain hemoglobin variants, recent blood loss or transfusions, and pregnancy. Your healthcare provider should interpret A1C results in context with your overall health status.

Disclaimer: This calculator provides an estimate of the relationship between A1C and average glucose based on population studies. Individual results may vary. Always discuss your diabetes management with your healthcare provider.

What Is the Estimated Average Glucose Calculator?

The Estimated Average Glucose Calculator helps users understand the relationship between HbA1c (A1C) values and average blood glucose levels. It provides an easy way for both patients and healthcare providers to track glucose levels over the past two to three months. This calculator simplifies the conversion process, making important Health information more accessible and understandable.

How Does It Work?

This calculator uses specific formulas to convert A1C percentages into Estimated Average Glucose (eAG) measurements. By entering an A1C value, the calculator will give you the estimated average glucose level in both mg/dL and mmol/L. Conversely, you can input an eAG value to find out the corresponding A1C percentage. This dual functionality makes it a versatile tool for managing Diabetes.

Why Is HbA1c Significant?

HbA1c is a vital test used to assess long-term glucose control in people with diabetes. Here’s why it matters:

  • It reflects average blood sugar levels over the last 2-3 months.
  • It helps in adjusting treatment plans based on long-term glucose trends.
  • It can indicate risk levels for complications related to diabetes.

Understanding Estimated Average Glucose

Estimated Average Glucose (eAG) translates A1C test results into units that people commonly use when monitoring their daily blood sugar. This can make it easier for patients to relate their A1C results to daily glucose readings, helping them better understand their health. The conversion allows for a clearer picture of how consistent their blood sugar levels are.

Using the Calculator Effectively

To obtain accurate results, it’s essential to enter values that fall within the specified ranges. For A1C, the input should be between 3% and 20%, while for eAG, the range is from 20 to 600 mg/dL. The calculator also allows users to adjust the decimal precision for their results. By checking these details, users can ensure they’re making informed decisions based on reliable data.

Interpreting Your Results

Once you have your conversion results, understanding what they mean is crucial. An A1C of 7.0%, for example, corresponds to an estimated average glucose of 154 mg/dL (or 8.6 mmol/L). This information can inform how well diabetes is being managed. It’s important to remember that most adults with diabetes should aim for an A1C of less than 7% to reduce the risk of complications.

Benefits of Regular Monitoring

Using the Estimated Average Glucose Calculator regularly can lead to better diabetes management. Some of the benefits include:

  • Improving understanding of long-term glucose levels.
  • Helping to track the effectiveness of current treatment plans.
  • Guiding lifestyle changes that could lead to better health outcomes.

Consultation with Healthcare Providers

While this calculator is a useful tool, it’s essential to discuss results with a healthcare provider. A professional can interpret these results in context and offer tailored advice based on individual health needs. Regular consultations ensure that diabetes management is comprehensive and considers all aspects of a patient’s health.