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Hemoglobin A1c blood test: what your result means
HbA1c estimates average blood glucose over about 2-3 months by measuring glucose attached to hemoglobin.
- Category
- Blood sugar and insulin
- Standard unit
- %
- Also called
- A1c, glycated hemoglobin
What does high hemoglobin A1c mean?
Higher values may suggest higher long-term glucose exposure. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low hemoglobin A1c mean?
Lower values may reflect lower average glucose exposure. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
Hemoglobin A1c units and conversion
Mediki shows hemoglobin A1c in %. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
Why track hemoglobin A1c over time?
A single hemoglobin A1c result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.
Read our guide on how to read blood test results to understand reference ranges, flags and units.
Following hemoglobin A1c as part of a panel? See the hbA1c tracker.
Track your hemoglobin A1c results in one chart
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Sources
Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.