Glucose to A1C Calculator
Enter the required values below to run the educational estimation.
What is Glycated Hemoglobin (A1C)?
Blood glucose molecules naturally bind to hemoglobin, a protein inside your red blood cells (glycation). Because red blood cells live for about 120 days, measuring the percentage of glycated hemoglobin (A1C) provides an estimate of average blood sugar over 2 to 3 months.
How the eAG-to-A1C Formula Works
This calculator utilizes the clinically validated ADAG (A1C-Derived Average Glucose) formula to estimate your HbA1c percentage based on your home-measured average daily glucose (estimated Average Glucose, or eAG).
Clinical Context of Estimated A1C
A normal estimated A1C is below 5.7%. Values between 5.7% and 6.4% indicate prediabetes, while a level of 6.5% or higher indicates diabetes. Always confirm home estimations with a certified laboratory blood draw.
When to Seek Urgent Medical Attention
- Severe shakiness, sweating, palpitations, or fainting (hypoglycemia).
- Blood sugar readings exceeding 250 mg/dL with vomiting, deep breathing, or abdominal pain.
- Extreme thirst accompanied by rapid weight loss and severe fatigue.
Frequently Asked Questions
HbA1c represents your average blood sugar over the past 2-3 months. The standard clinical formula is: A1C = (Average Glucose mg/dL + 46.7) / 28.7.
Yes. Home meters may have calibration variances, and red blood cell lifespans affect HbA1c binding rates, creating variations from laboratory results.
