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eAG (mmol/L) = eAG(mg/dL) ÷ 18.018
HbA1c(%) = (eAG + 46.7) ÷ 28.7
Endocrinology
HbA1c ↔ Average Glucose Converter
ADA ADAG study formula: bidirectional HbA1c and eAG conversion
HbA1c → eAG
eAG → HbA1c
Please enter HbA1c between 3 and 20%.
Please enter eAG between 60 and 600 mg/dL.
✓ Result
ADA Targets
- General adult with diabetes: <7.0%
- Elderly / complex patients: <8.0%
- Pregnancy: <6.5% (or <6.0% if no hypoglycemia risk)
Reference Table
| HbA1c (%) | eAG (mg/dL) | eAG (mmol/L) | Category |
|---|---|---|---|
| 5.0 | 97 | 5.4 | Normal |
| 5.7 | 117 | 6.5 | Prediabetes threshold |
| 6.0 | 126 | 7.0 | Prediabetes |
| 6.5 | 140 | 7.8 | Diabetes threshold |
| 7.0 | 154 | 8.6 | ADA target |
| 8.0 | 183 | 10.2 | Poor control |
| 9.0 | 212 | 11.8 | Very poor control |
| 10.0 | 240 | 13.3 | Very poor control |
Formula — ADAG Study, ADA 2008
eAG (mg/dL) = 28.7 × HbA1c(%) − 46.7eAG (mmol/L) = eAG(mg/dL) ÷ 18.018
HbA1c(%) = (eAG + 46.7) ÷ 28.7
