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Diabetes Tests

Hemoglobin A1C Test

What is a hemoglobin A1C​?

It’s a blood test that measures the amount of sugar on the hemoglobin in your red blood cells. Another name for it is A1C. It represents your average blood sugar over the past 3 months, because 3 months is how long a red blood cell lives. With this test, your average blood sugar level gets reported as a percentage.

What is my A1C target?

The A1C target for most people with diabetes is 7% or less. Depending on the person, the target can vary from 6.5% to 8.5%.

A1C compared to daily blood sugar levels

A1C​​​​Average Blood Sugar
14%​​19.6 mmol/L
12%​16.5 mmol/L​
​10%13.3 mmol/L​
9%​11.7 mmol/L​
8%​10.1 mmol/L​
7%​​8.6 mmol/L
6%​7.0 mmol/L​​

How often do I go to the lab?

Your A1C blood test should be done every 3 months if:

  • Your blood sugars are not in target.
  • You’re starting new diabetes medicines.
  • You’re changing your diabetes medicines.

When your blood sugars are almost always in target, you can have an A1C blood test every 6 months.

Why should I lower my A1C?

Research shows that lowering your A1C by 1% lowers the risk of heart problems, kidney, nerve, and eye disease by up to 40%.

Current as of: February 9, 2018

Author: Primary Care and Chronic Disease Management, Alberta Health Services