A1C: What It Is, Test, Levels & Chart - Cleveland Clinic
What is an A1C test? An A1C test measures the average amount of glucose (sugar) in your blood over the past three months. The result is reported as a percentage. The higher the …
What does an A1C/eAG result mean? Usually, your A1C gives you general trend in your blood sugar that matches what you see with your day-to-day blood sugar checks. Sometimes, …
The A1C Test: Uses, Procedure, Results - Verywell Health
Dec 25, 2025 · The A1C test, also known as an HbA1C, hemoglobin A1C, glycated hemoglobin, or glycosylated hemoglobin test, is a blood test used to diagnose and monitor diabetes. It …
A1C Test for Diabetes and Prediabetes | Diabetes | CDC
May 15, 2024 · Higher A1C levels are linked to health complications, so reaching and maintaining your goal is key to living well with diabetes. With lifestyle changes and medicines (if …
A1C test - Mayo Clinic
Feb 22, 2025 · An A1C test result shows the average blood sugar level over the past 2 to 3 months. The A1C test measures what percentage of hemoglobin in the blood is coated with …
Hemoglobin A1c Test: Levels, Normal, High, Low, Chart, Schedule
Jul 18, 2025 · Hemoglobin A1c levels correlate with average levels of glucose in the blood over an approximately three-month time. Normal ranges for hemoglobin A1c in people without …
A1C chart: Test, levels, and more for diabetes - Medical News …
Mar 27, 2025 · Doctors use the A1C test to check for prediabetes and diabetes. A range of 5.7 to 6.4% suggests a person may have prediabetes. Over 6.5% indicates diabetes. This test also …
A1C: What It Is and What Normal Levels Are - Health
Oct 1, 2025 · HbA1C testing can help a healthcare provider determine if a person has type 2 diabetes or prediabetes. Your blood sugar may be high due to the body's inability to make …
The A1C Test & Diabetes - NIDDK
Health care professionals can use the A1C test alone or in combination with other diabetes tests to diagnose type 2 diabetes and prediabetes. You don’t have to fast before having your blood …
Hemoglobin A1c Test (HbA1c), Normal, High, Low Levels, Charts & Results
Many laboratories report a calculated eAG (estimated average glucose) along with every HbA1c results. This is a correlation of the HbA1c levels with the average blood sugar level. For …