A1c to Blood Sugar Calculator

A1C to Estimated Average Glucose (eAG) Calculator

function calculateA1C() { var a1cInput = document.getElementById("a1cValue").value; var errorMessageDiv = document.getElementById("errorMessage"); errorMessageDiv.innerHTML = ""; // Clear previous errors if (a1cInput === "" || isNaN(a1cInput)) { errorMessageDiv.innerHTML = "Please enter a valid A1C percentage."; document.getElementById("eagMgdlResult").innerHTML = ""; document.getElementById("eagMmolResult").innerHTML = ""; return; } var a1c = parseFloat(a1cInput); if (a1c 15) { // Typical A1C range for meaningful calculation errorMessageDiv.innerHTML = "Please enter an A1C percentage between 4% and 15%."; document.getElementById("eagMgdlResult").innerHTML = ""; document.getElementById("eagMmolResult").innerHTML = ""; return; } // Formula for eAG in mg/dL: (28.7 * A1C) – 46.7 var eagMgdl = (28.7 * a1c) – 46.7; // Convert mg/dL to mmol/L: mg/dL / 18 var eagMmol = eagMgdl / 18; document.getElementById("eagMgdlResult").innerHTML = eagMgdl.toFixed(1); document.getElementById("eagMmolResult").innerHTML = eagMmol.toFixed(1); } .calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; padding: 25px; border-radius: 10px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); max-width: 500px; margin: 30px auto; border: 1px solid #e0e0e0; } .calculator-container h2 { text-align: center; color: #2c3e50; margin-bottom: 25px; font-size: 1.8em; } .calculator-form .form-group { margin-bottom: 18px; } .calculator-form label { display: block; margin-bottom: 8px; color: #34495e; font-weight: bold; font-size: 1.05em; } .calculator-form input[type="number"] { width: calc(100% – 22px); padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 1.1em; box-sizing: border-box; transition: border-color 0.3s ease; } .calculator-form input[type="number"]:focus { border-color: #007bff; outline: none; box-shadow: 0 0 5px rgba(0, 123, 255, 0.3); } .calculate-button { display: block; width: 100%; padding: 14px; background-color: #007bff; color: white; border: none; border-radius: 6px; font-size: 1.2em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; margin-top: 20px; } .calculate-button:hover { background-color: #0056b3; transform: translateY(-2px); } .calculate-button:active { transform: translateY(0); } .result-container { background-color: #e9f7ef; border: 1px solid #d4edda; border-radius: 8px; padding: 20px; margin-top: 25px; text-align: center; } .result-container h3 { color: #28a745; margin-top: 0; margin-bottom: 15px; font-size: 1.5em; } .result-container p { font-size: 1.2em; color: #333; margin-bottom: 10px; } .result-container span { font-weight: bold; color: #0056b3; } #errorMessage { margin-top: 15px; font-weight: bold; font-size: 1em; }

Understanding Your A1C and Estimated Average Glucose (eAG)

The A1C test, also known as the hemoglobin A1C or HbA1c test, is a crucial blood test used to diagnose and monitor diabetes. It provides an average of your blood sugar levels over the past two to three months. Unlike daily blood glucose readings, which show your sugar level at a specific moment, the A1C offers a broader picture of your glucose control.

What is A1C?

Hemoglobin is a protein in your red blood cells that carries oxygen. When glucose (sugar) enters your bloodstream, it attaches to hemoglobin. This process is called glycation. The more glucose in your blood, the more it attaches to hemoglobin. The A1C test measures the percentage of hemoglobin that is glycated. A higher A1C percentage indicates higher average blood sugar levels.

• Normal A1C: Below 5.7%
• Prediabetes: 5.7% to 6.4%
• Diabetes: 6.5% or higher

What is Estimated Average Glucose (eAG)?

While A1C is expressed as a percentage, many people are more familiar with blood sugar readings in mg/dL (milligrams per deciliter) or mmol/L (millimoles per liter), which are used for daily glucose monitoring. The Estimated Average Glucose (eAG) is a calculated value that converts your A1C percentage into the same units you see on your home blood glucose meter. This makes it easier to understand what your A1C result means in terms of your daily blood sugar levels.

The eAG provides a helpful bridge between the long-term A1C measurement and the day-to-day blood sugar numbers you might be tracking. It's important to remember that eAG is an estimate and individual daily glucose levels will fluctuate.

How to Use the A1C to eAG Calculator

Our A1C to eAG calculator simplifies the conversion process. Here's how to use it:

1. Enter Your A1C Percentage: In the input field labeled "A1C Percentage (%)", enter your most recent A1C test result. For example, if your A1C was 7.0%, you would enter '7.0'.
2. Click "Calculate eAG": Press the button to instantly see your estimated average glucose levels.
3. View Results: The calculator will display your eAG in two common units: mg/dL (milligrams per deciliter) and mmol/L (millimoles per liter).

Example Calculation:

Let's say your A1C test result is 7.0%.

• Using the calculator, you would input 7.0.
• The calculator would then show:
  • Estimated Average Glucose (eAG): 154.2 mg/dL
  • Estimated Average Glucose (eAG): 8.6 mmol/L

This means that an A1C of 7.0% roughly corresponds to an average blood sugar level of about 154 mg/dL or 8.6 mmol/L over the past 2-3 months.

Why is This Conversion Important?

Converting A1C to eAG can help you:

• Better Understand Your A1C: It translates a percentage into a more familiar blood sugar number.
• Compare with Daily Readings: You can compare your eAG to the average of your daily blood glucose meter readings to see if they align.
• Set Goals: Work with your healthcare provider to set target A1C and eAG levels.
• Track Progress: Monitor how lifestyle changes, medication, or other interventions are impacting your long-term blood sugar control.

Important Disclaimer:

This calculator provides an estimate based on standard formulas. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with your doctor or healthcare provider for interpretation of your A1C results and for any health concerns. Individual factors can influence the relationship between A1C and eAG, and your healthcare provider is the best resource for personalized guidance.