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SESK: Stuff Everyone Should Know · sesk.info/diab-normal-a1c

What A1C result counts as normal?

Below 5.7%.

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  1. Below 5.7% ✔
  2. 5.7% to 6.4%
  3. 6.5% or above

Why: On the A1C test, CDC lists below 5.7% as normal, 5.7% to 6.4% as prediabetes and 6.5% or above as diabetes.

Huh, didn't know that: A1C is reported as a percentage, not in mg/dL like a meter reading.

The dad joke
My A1C and I have a great relationship. I keep it low and it keeps me happy.
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References

Answer: Below 5.7%. On the A1C test, CDC lists below 5.7% as normal, 5.7% to 6.4% as prediabetes and 6.5% or above as diabetes.

  1. CDC: Testing for Diabetes www.cdc.gov/diabetes/diabetes-testing/index.html
    below 5.7%
    Checked 2026-10-09.

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