HbA1c Converter

HbA1c (glycated hemoglobin or glycosylated hemoglobin) measures the average blood glucose levels over the past 2-3 months. It indicates the percentage of hemoglobin proteins in the blood that have glucose attached. Two measurement systems exist: the NGSP/DCCT system (used in the US) reports values as percentages (%), while the IFCC system (used in Europe) reports values in mmol/mol. A normal HbA1c is below 5.7% (39 mmol/mol). Prediabetes ranges from 5.7-6.4% (39-47 mmol/mol), and diabetes is diagnosed at 6.5% (48 mmol/mol) or higher. The HbA1c test is crucial for long-term diabetes management as it provides a broader picture than daily glucose readings. The conversion formula is: IFCC (mmol/mol) = (NGSP (%) - 2.15) × 10.929.