Blood Sugar A1C Calculator

Understanding the Blood Sugar A1C Calculator

What is A1C?

A1C, also known as HbA1c or glycated hemoglobin, is a measure of your average blood sugar levels over the past 2-3 months. It provides valuable information about long-term blood glucose control and is widely used in diagnosing and managing diabetes.

The A1C to eAG Formula

The relationship between A1C and estimated average glucose (eAG) can be expressed by the following formula:

\[eAG (mg/dL) = (28.7 \times A1C) - 46.7\]

Where:

• eAG = Estimated Average Glucose (in mg/dL)
• A1C = Hemoglobin A1C value (as a percentage)
• 28.7 and 46.7 are constants derived from clinical studies

Calculation Steps

To calculate eAG from A1C:

1. Multiply the A1C value by 28.7
2. Subtract 46.7 from the result

Example: For an A1C of 7.0%

\[eAG = (28.7 \times 7.0) - 46.7\]

\[eAG = 200.9 - 46.7 = 154.2 \text{ mg/dL}\]

Visual Representation

Interpreting A1C Results

A1C (%)	eAG (mg/dL)	Interpretation
< 5.7	< 117	Normal
5.7 - 6.4	117 - 137	Prediabetes
≥ 6.5	≥ 140	Diabetes

This A1C calculator provides a quick and easy way to convert A1C percentages to estimated average glucose levels, helping both patients and healthcare providers better understand and manage diabetes.