Know Your Blood Glucose Numbers

  A1c (Percent) Fasting Plasma Glucose (mg/dL)

Oral Glucose Tolerance Test (mg/dL)

Diabetes 6.5 or above 126 or above 200 or above
Pre‐diabetes 5.7 to 6.4 100 to 125 140 to 199
Normal About 5 99 or below 139 or below

For all three tests, within the pre‐diabetes range, the higher the test result, the greater the risk of diabetes.
Reference: http://diabetes.niddk.nih.gov/dm/pubs/diagnosis/