A1c (HbA1c) Calculator

Convert between A1c percentage and estimated average glucose (eAG) levels. A1c measures your average blood sugar over the past 2-3 months.

Normal: Below 5.7% | Prediabetes: 5.7-6.4% | Diabetes: 6.5% or higher

About A1c

What is A1c? Hemoglobin A1c (HbA1c) is a blood test that measures your average blood sugar levels over the past 2-3 months.

Normal Range: Below 5.7%

Prediabetes: 5.7% to 6.4%

Diabetes: 6.5% or higher

Note: This calculator provides estimates only. Always consult with your healthcare provider for accurate diagnosis and treatment.