Est. Avg Glucose
Estimated Average Glucose (eAG)
Estimated average glucose, or eAG, converts your HbA1c into the units used for blood sugar readings. It estimates an average over the past two to three months. It is not a separate measurement of your blood sugar today.
What does a high eAG mean?
A high eAG usually reflects a high HbA1c. An average can hide both high and low readings, so it may differ from individual finger-stick or sensor readings. It should not be compared with a fasting glucose cutoff.
Use HbA1c to interpret the estimate
There is no separate diagnostic eAG threshold. Diagnosis and treatment goals use HbA1c or measured glucose, as appropriate. For orientation, an HbA1c of 7% corresponds to an eAG of about 154 mg/dL (8.6 mmol/L); that is a conversion example, not a goal for everyone.
Sources: MedlinePlus (NIH)
What can change this result?
What can raise the estimate
- A higher HbA1c: eAG is calculated from it, not measured separately.
- Eating patterns that repeatedly raise blood sugar over the previous months.
- Diabetes that is untreated or needs a treatment adjustment.
What can help lower average glucose
- Adjusting carb portions and choosing fewer sugary drinks.
- Making movement a regular part of your week.
- Taking diabetes medicines as prescribed, when needed.
Anemia or other conditions that affect HbA1c also affect this estimate. Compare it with the pattern of your glucose readings, not one finger-prick result.
What should I do next?
- Find the HbA1c result that the estimate was calculated from.
- If you monitor glucose, discuss why your readings and eAG differ rather than changing treatment from eAG alone.
- Ask which measure and target should guide your follow-up.
How this test works
The estimate is derived from a research-based relationship between HbA1c and average glucose. It cannot reproduce every person’s actual average or show how widely their glucose varies.