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AhaBulb: Stuff Everyone Should Know · ahabulb.com/diab-prediabetes-a1c

What A1C range counts as prediabetes?

5.7% to 6.4%, higher than normal but not yet diabetes.

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  1. 5.7% to 6.4% ✔
  2. 4.0% to 5.0%
  3. 7.0% to 8.0%

Why: Under 5.7% is normal. From 5.7% to 6.4% means blood sugar is higher than normal but not in the diabetes range. That is a chance to act early, since prediabetes doesn't have to become type 2.

Huh, didn't know that: Prediabetes can also show up as a fasting blood sugar of 100 to 125 mg/dL.

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References

Answer: 5.7% to 6.4%. Under 5.7% is normal. From 5.7% to 6.4% means blood sugar is higher than normal but not in the diabetes range. That is a chance to act early, since prediabetes doesn't have to become type 2.

  1. NIDDK, Diabetes Tests and Diagnosis www.niddk.nih.gov/health-information/diabetes/overview/tests-diagnosis
    Prediabetes 5.7% to 6.4%
    Checked 2026-10-09.

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Health BasicsAn A1C at or above what level is used to diagnose diabetes?Health BasicsCan an adult be newly diagnosed with type 1 diabetes?Health BasicsWhat fasting blood sugar result is in the diabetes range?

That's stuff everyone should know.