HbA1c (glycated hemoglobin) provides an average blood glucose level over the preceding 2 - 3 months. However, it can be difficult to compare to the blood glucose value that diabetics see on their at-home blood glucose meters. Hence, HbA1c can also be presented as an eAG (estimated average glucose) reading. This table is from the American Diabetes Association to show the correlation between HbA1c and eAG.
| HbA1c (%) | eAG (mg/dL) | eAG (mmol/L) |
| 6.0 | 126 | 7.0 |
| 6.5 | 140 | 7.8 |
| 7.0 | 154 | 8.6 |
| 7.5 | 169 | 9.4 |
| 8.0 | 183 | 10.1 |
| 8.5 | 197 | 10.9 |
| 9.0 | 212 | 11.8 |
| 9.5 | 226 | 12.6 |
| 10.0 | 240 | 13.4 |
NOTE: Diabetic individuals usually measure their blood sugar in the morning before eating, hence blood glucose readings are likely to be lower than the eAG shown here.