This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
HbA1c ↔ mmol/mol ↔ estimated average glucose (eAG)
Conversion of HbA1c (NGSP %) in IFCC (mmol/mol) and estimated average glucose (eAG, ADAG regression formula)
Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.
Frequently asked questions
HbA1c ↔ mmol/mol ↔ estimated average glucose (eAG): What does this calculator compute?
Converts HbA1c between NGSP percent and IFCC mmol/mol (master equation) and estimates the mean blood glucose of the past months according to the ADAG study (eAG = 28.7 × HbA1c − 46.7 mg/dl; Nathan 2008) – with the note that children were not included in the ADAG study.
HbA1c ↔ mmol/mol ↔ estimated average glucose (eAG): Which sources is this calculator based on?
Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ; A1c-Derived Average Glucose Study Group: Translating the A1C assay into estimated average glucose values (Diabetes Care 31:1473–1478) (2008); Hoelzel W, Weykamp C, Jeppsson JO, et al.: IFCC reference system for measurement of hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan, and Sweden: a method-comparison study (Clin Chem 50:166–174) (2004)