Healthwise

Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

What Is A1c?

Overview

An A1c test is a blood test that checks your average blood sugar level over the past 2 to 3 months. This test also is called a glycohemoglobin test or a hemoglobin A1c test.

The A1c test is one of the tests used to diagnose prediabetes and diabetes. If you have diabetes, this test is done to check how well your diabetes has been managed over the past 2 to 3 months. Your doctor can use this information to adjust your treatment, if needed.

What do the results of an A1c test mean?

The test result is usually given as a percentage. The normal A1c is less than 5.7%. You have a higher risk for diabetes if your A1c is 5.7% to 6.4%. If your level is 6.5% or higher, you have diabetes.

The A1c test result also can be used to find your estimated average glucose, or eAG. Your eAG and A1c show the same thing in two different ways. They both help you learn more about your average blood sugar range over the past 2 to 3 months. A1c is shown as a percentage, while eAG uses the same units (mg/dl) as your glucose meter.

Examples:

  • 6% A1c = 126 mg/dL
  • 7% A1c = 154 mg/dL
  • 8% A1c = 183 mg/dL
  • 9% A1c = 212 mg/dL
  • 10% A1c = 240 mg/dL
  • 11% A1c = 269 mg/dL
  • 12% A1c = 298 mg/dL

Related Information

Credits

Current as of: October 2, 2023

Author: Healthwise Staff
Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

Due to the threat of the COVID-19 (Coronavirus), we are taking precautionary measures to protect our staff and patients. We are implementing a temporary NO VISITOR policy at this time. Only patients or patients and their guardians will be allowed into the office. Please note, this is not to inconvenience anyone! The virus is a very real threat and it is essential that we stay healthy in order to provide needed care for our patients. If you are sick, we ask that you CALL the office to speak with a nurse before you come in. The nurse will provide specific instructions for you. Please DO NOT enter the office if you are sick (upper respiratory symptoms, fever, cough, or flu like symptoms). We are closely monitoring the situation and will update you as circumstances change. Thank you for your understanding!!