Hemoglobin A1c test measures your average blood sugar level over the past 2-3 months. Learn what it means, how to prepare for it, and what the results indicate for your diabetes risk.

The A1C test is a common blood test used to diagnose type 1 and type 2 diabetes. If you're living with diabetes, the test is also used to monitor how well you're managing blood sugar levels. The A1C test is also called the glycated hemoglobin, glycosylated hemoglobin, hemoglobin A1C or HbA1c test.

Learn about the A1C test, a simple blood sugar test to diagnose prediabetes or diabetes, hemoglobin A1C and what do numbers mean, and how A1C relates to eAG.

A hemoglobin A1C test is a blood test that measures the amount of glucose (sugar) attached to hemoglobin. High A1C levels can be a sign of diabetes. Learn more.

The A1C test measures the amount of hemoglobin with attached glucose and reflects your average blood glucose levels over the past 3 months. The A1C test result is reported as a percentage. The higher the percentage, the higher your blood glucose levels have been.

The hemoglobin A1c (glycated hemoglobin, glycosylated hemoglobin, HbA1c, or A1c) test is used to evaluate a person's level of glucose control. The test shows an average of the blood sugar level over the past 90 days and represents a percentage. The test can also be used to diagnose diabetes. [1]

The A1C test—also known as the hemoglobin A1C or HbA1c test—is a simple blood test. Your A1C is used to diagnose prediabetes and diabetes, and monitor your progress. Find out more about the test, and your A1C goals. What does the A1C test measure? When you check your blood sugar at home, it's a snapshot of a single point in time.

Learn what a hemoglobin A1C test is, how it measures your average blood sugar levels over three months, and what the results mean. Find out how the test can help diagnose or monitor diabetes or prediabetes, and what factors can affect the accuracy of the test.

A hemoglobin A1C test measures the average amount of blood sugar attached to hemoglobin over the past three months. It can help diagnose or monitor diabetes and prediabetes in adults, but it is not used for gestational diabetes or children.