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A1C & Blood Sugar Converter

Convert A1C to estimated average glucose (eAG) and back. Includes mg/dL to mmol/L converter and diabetes range chart.

Calculator

Convert A1C to estimated average glucose and back.

Conversion Mode

A1C

5.7%

eAG (mg/dL)

116.9

eAG (mmol/L)

6.5

Prediabetes (5.7 – 6.4%)

This means your average blood sugar over the past 3 months was approximately 116.9 mg/dL (6.5 mmol/L).

Normal< 5.7%eAG: 68.1–116.9 mg/dL

Prediabetes5.7 – 6.4%eAG: 116.9–139.8 mg/dL

Diabetes≥ 6.5%eAG: 139.8–240.3 mg/dL

Iron Deficiency

Can falsely elevate A1C results.

Hemoglobin Variants

Sickle cell or other hemoglobinopathies may affect accuracy.

Recent Blood Loss/Transfusion

Can falsely lower A1C.

Kidney Disease

May affect red blood cell lifespan and A1C accuracy.

Pregnancy

A1C may be lower due to increased red blood cell turnover.

⚠️ This is an educational tool, not a substitute for medical advice. Consult your healthcare provider.