← All Calculators
HbA1c Converter — Understand Your Long-Term Blood Sugar
Convert your HbA1c value to estimated average glucose (eAG) or reverse. Instantly see your risk category.
Risk Categories (ADA)
Normal
No elevated diabetes risk.
Prediabetes
Elevated risk. Lifestyle changes recommended.
Diabetes
Diabetes range. Consult a doctor.
Frequently Asked Questions
What is HbA1c?+
HbA1c is the glycated portion of hemoglobin in red blood cells. It reflects the average blood-sugar level over the past 8–12 weeks. Source: American Diabetes Association (ADA).
What are the reference ranges?+
Normal: < 5.7 % (39 mmol/mol). Prediabetes: 5.7–6.4 % (39–47 mmol/mol). Diabetes: ≥ 6.5 % (48 mmol/mol). Source: ADA.
How are NGSP % and IFCC mmol/mol converted?+
HbA1c (mmol/mol) = (HbA1c % − 2.15) × 10.929. NGSP (%) is the older US standard; IFCC (mmol/mol) is the international standard.
What can falsely alter HbA1c?+
Anemia, hemoglobinopathies (e.g. sickle cell), pregnancy, kidney failure, and recent blood transfusions can distort the value.
How often should HbA1c be measured?+
Every 6 months if diabetes is stable; every 3 months if treatment is changing or control is poor. Source: ADA Standards of Care.
What HbA1c target is recommended?+
Individualized — typically < 7 % (53 mmol/mol). Young patients without comorbidities may target < 6.5 %; older patients often 7.5–8 % to avoid hypoglycemia.
Related Calculators
Alcohol Unit Calculator
Calculate your weekly alcohol consumption in UK units, grams of pure alcohol, and health risk.
Anemia Risk Calculator
Estimate your anemia risk from hemoglobin level, sex, and clinical symptoms.
Anion Gap Calculator
Calculate anion gap and classify metabolic acidosis. Includes albumin correction.
Asthma Control Test (ACT)
Calculate your ACT score — assess asthma control over the past 4 weeks.
Background
HbA1c Converter — Understanding Your Long-Term Blood Sugar
7 min