HbA1c to eAG Converter
Convert Hemoglobin A1c percentages to estimated Average Glucose (eAG) in mg/dL and mmol/L. Visualize the correlation between long-term control and daily levels.
About
Hemoglobin A1c (HbA1c) reflects the average blood glucose levels over the preceding two to three months. However, daily monitoring usually occurs in mg/dL or mmol/L. The estimated Average Glucose (eAG) metric bridges this gap, translating the A1c percentage into the same units used by standard glucometers. This correlation helps patients and clinicians understand how long-term trends align with daily readings. The conversion is based on the ADAG (A1c-Derived Average Glucose) study, which established the linear relationship between A1c and mean glucose concentrations.
Formulas
The ADAG study established the following linear regression equation to convert HbA1c to estimated Average Glucose (eAG):
For international units (mmol/L), the conversion is derived from the molecular weight of glucose:
Reference Data
| HbA1c (%) | eAG (mg/dL) | eAG (mmol/L) | Control Level |
|---|---|---|---|
| 5.0 | 97 | 5.4 | Normal |
| 5.5 | 111 | 6.2 | Normal |
| 6.0 | 126 | 7.0 | Pre-diabetes |
| 6.5 | 140 | 7.8 | Diabetes Diagnosis |
| 7.0 | 154 | 8.6 | Target (Adults) |
| 8.0 | 183 | 10.2 | Elevated |
| 9.0 | 212 | 11.8 | High |
| 10.0 | 240 | 13.4 | Very High |
| 11.0 | 269 | 14.9 | Critical |
| 12.0 | 298 | 16.5 | Critical |