Panel guide
Hemoglobin A1c
A1c reflects average blood glucose over roughly the prior two to three months.
General biomarker education — not personalized medical advice. Learn more
What it measures
Hemoglobin A1c (HbA1c) estimates the percentage of hemoglobin with glucose attached. It is reported as a percent on most U.S. laboratory reports.
Why people track it
Many people track A1c across visits because it summarizes longer-term glucose patterns than a single fasting glucose.
How to read your report
Conditions affecting red blood cells can influence A1c. Compare the extracted value and units with your original laboratory report.
Important note
This is general information about laboratory markers. It is not a diagnosis, treatment plan, or personalized medical advice. Discuss your results with your clinician.
Upload the report you just learned to read
Confirm extracted values against your source PDF. Charts use the range printed on that report.
See how it works →Questions for your clinician
- How does this A1c compare with my previous results?
- Should glucose and A1c be reviewed together at my visit?