Skip to content

Diabetes Health Center

Font Size
A
A
A

Glycohemoglobin (HbA1c, A1c)

Results continued...

The American Diabetes Association (ADA) criteria to diagnose diabetes includes the option of testing A1c. The diagnosis of diabetes needs to be confirmed by repeating the same blood sugar test or doing a different test on another day.

Normal

The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

Hemoglobin A1c 1
Normal

Less than 5.7%

Prediabetes (increased risk for diabetes)

5.7%–6.4%

Diabetes

6.5% and higher

The ADA recommends that most nonpregnant adults who have type 1 or type 2 diabetes have an A1c level less than 7%.2 The American Academy of Pediatrics recommends that most children with type 2 diabetes have an A1c level less than 7%.3 Talk to your doctor about your diabetes treatment plan and your target A1c goal.

A1c and estimated average glucose (eAG) 2
A1c % Estimated average plasma glucose (mg/dL) Estimated average plasma glucose (mmol/L)
6%

126

7.0

7%

154

8.6

8%

183

10.2

9%

212

11.8

10%

240

13.4

11%

269

14.9

12%

298

16.5

A1c recommendations for children and teens with type 1 diabetes 2
Age A1c %
Children younger than 6 years old Less than 8.5%
Children ages 6–12 years old Less than 8%
Teens ages 13–19 years old Less than 7.5%

High values

Some medical conditions can increase A1c levels, but the results may still be within a normal range. These conditions include Cushing's syndrome, pheochromocytoma, and polycystic ovary syndrome (PCOS).

Corticosteroid treatment increases the A1c level.

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

  • Having severe blood loss or a blood transfusion in the last 3 months.
  • Having certain medical conditions, such as sickle cell anemia, hemolytic anemia, some types of thalassemia, and severe kidney disease.
  • Having your spleen taken out. This changes the normal life cycle of red blood cells and A1c levels.

WebMD Medical Reference from Healthwise

Last Updated: October 07, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

Is This Normal? Get the Facts Fast!

Check Your Blood Sugar Level Now
What type of diabetes do you have?
Your gender:

Get the latest Diabetes newsletter delivered to your inbox!


or
Answer:
Low
0-69
Normal
70-130
High
131+

Your level is currently

If the level is below 70 or you are experiencing symptoms such as shaking, sweating or difficulty thinking, you will need to raise the number immediately. A quick solution is to eat a few pieces of hard candy or 1 tablespoon of sugar or honey. Recheck your numbers again in 15 minutes to see if the number has gone up. If not, repeat the steps above or call your doctor.

People who experience hypoglycemia several times in a week should call their health care provider. It's important to monitor your levels each day so you can make sure your numbers are within the range. If you are pregnant always consult with your health care provider.

Congratulations on taking steps to manage your health.

However, it's important to continue to track your numbers so that you can make lifestyle changes if needed. If you are pregnant always consult with your physician.

Your level is high if this reading was taken before eating. Aim for 70-130 before meals and less than 180 two hours after meals.

Even if your number is high, it's not too late for you to take control of your health and lower your blood sugar.

One of the first steps is to monitor your levels each day. If you are pregnant always consult with your physician.

Did You Know Your Lifestyle Choices
Affect Your Blood Sugar?

Use the Blood Glucose Tracker to monitor
how well you manage your blood sugar over time.

Get Started

This tool is not intended for women who are pregnant.

Start Over

Step:  of 

Today on WebMD

Diabetic tools
Symptoms, diagnosis, treatment, and more.
woman flexing muscles
10 strength training exercises.
 
Blood sugar test
12 practical tips.
Tom Hanks
Stars living with type 1 or type 2.
 
Woman serving fast food from window
Video
Can Vinegar Treat Diabetes
Video
 
Middle aged person
Tool
are battery operated toothbrushes really better
Video
 

Prediabetes How to Prevent Type 2 Diabetes
Article
type 2 diabetes
Slideshow
 
food fitness planner
Tool
Are You at Risk for Dupuytrens Contracture
Article