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Understanding Diabetes Readings

Your blood glucose levels will vary depending on the time you take the reading. Your healthcare provider will recommend the optimal time to measure your blood glucose levels. 


For example, you may be asked to check your blood sugar levels while fasting or before and after meals (to see how your meal had an impact on your blood sugar), before all meals, or at bedtime. 

  • A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal. 

  • A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes. 

  • A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes.


The American Diabetes Association (ADA) and the American Association of Clinical Endocrinologists (AACE) have recommendations for blood glucose targets for most people with type 2 diabetes: 


Fasting and Before Meals:

2 Hours After Eating a Meal:

ADA Recommendations: 

80-130 mg/dL 

<180 mg/dL 

AACE Recommendations:

<110 mg/dL

<140 mg/dL

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