HbA1c Report Decoder
Enter your HbA1c and blood sugar values. The decoder uses the standard ADA cut-offs that doctors use: HbA1c under 5.7% is normal, 5.7–6.4% is prediabetes, and 6.5% or above is the diabetes range.
Normal: 4.0–5.6 %
Normal: 70–99 mg/dL
Normal: 0–139 mg/dL
Frequently Asked Questions
What is a normal HbA1c?
Under 5.7% is normal. 5.7–6.4% is prediabetes, and 6.5% or above is diabetes (usually confirmed by a second test). For many people already on diabetes treatment, a common target is under 7% — your doctor sets yours.
What is the difference between HbA1c and fasting sugar?
Fasting sugar is one moment in time; HbA1c reflects your average blood sugar over the past 2–3 months, because sugar sticks to red blood cells for their whole lifespan. That is why doctors rely on HbA1c for diagnosis and long-term control.
Can HbA1c be wrong?
Yes, sometimes: anemia, recent blood transfusion, some hemoglobin variants and pregnancy can distort it, because the test depends on red blood cells. If HbA1c does not match your sugar readings, doctors use fasting/OGTT tests instead.
I am in the prediabetes range. Can it be reversed?
Very often, yes — prediabetes is the warning stage where weight loss, daily activity and cutting sugar and refined flour can bring values back to normal. A doctor or dietitian can set a plan and a retest date, usually in 3–6 months.
Go deeper: read the full Biochemistry hub guide, or try the main Report Decoder.