HbA1c → estimated average glucose (eAG)
Conversion of HbA1c to average plasma glucose using ADAG equations. Supports NGSP (%) and IFCC (mmol/mol) units.
About this calculator
Equations from Nathan et al. (2008, ADAG study): eAG (mg/dL) = 28.7 × HbA1c − 46.7. NGSP/IFCC conversion: IFCC = 10.93 × NGSP − 23.5. Useful for patient communication about average glucose and diabetes control assessment.
Source
Formula version: nathan-2008-v1
Related
Calculators
- HOMA-IR calculator online: insulin resistance index, formula, reference rangesHOMA-IR calculator using the original Matthews 1985 formula. Enter fasting insulin (µU/mL) and fasting glucose (mmol/L or mg/dL) – the tool returns the index plus interpretation by clinical cutoffs: normal (< 2.0), early resistance (2.0–2.9), significant resistance (≥ 3.0).
- FINDRISC (Type 2 Diabetes Risk)Finnish score for 10-year type 2 diabetes risk assessment.
- PhenoAge biological ageBiological age from 9 lab biomarkers plus chronological age. Validated against epigenetic clocks and all-cause mortality.
- Daily calorie target for weight lossDaily calorie target for desired weekly weight loss, factoring in BMR, activity, and a safe intake floor.
- FIB-4 — non-invasive liver fibrosis indexNon-invasive index of advanced liver fibrosis from age, AST, ALT, and platelets. Used as first-line screening in NAFLD and chronic viral hepatitis.
Drugs