Glucose, estimated average (eAG)

An estimated average blood glucose derived from HbA1c.

Last reviewedJune 16, 2026

Calculated

sample type

Not applicable (calculated)

blood needed

~7 days

results in app

Same as its component test

best timing

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On this page

Why test Reference ranges What you'll learn What affects it How testing works Sources FAQ

In short

Estimated average glucose (eAG) is a calculated value, not a separate blood test. It converts your HbA1c result into the average blood sugar level it reflects over the past two to three months, expressed in the same units as a glucose reading.

The formula is: eAG (mg/dL) = 28.7 × HbA1c (%) − 46.7. To express it in SI units, that result is divided by 18.0182 to give mmol/L.

Metabolic & Diabetes

Reviewed against DGKL reference practice.

Why test this?

HbA1c is reported as a percentage, which can be hard to relate to the day-to-day glucose numbers people see on a meter. eAG translates that percentage into a familiar average glucose value, making it easier to understand what your long-term control looks like.

A higher eAG means your average blood sugar has been running high, which over time raises the risk of diabetes complications. A lower eAG reflects tighter average control.

What is a normal result?

Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.

Adult reference values as used by Aniva. Ranges are guidance and can vary by laboratory and method.

Group	Normal range	Optimal range
Adults	70 to 114 mg/dL	80 to 103 mg/dL

Sources: ADA Standards of Care in Diabetes—2024 (Diagnosis)

Your Aniva report reads your result against these values together with your age, sex and the rest of your panel.

Ranges are guidance and vary by lab and assay, aligned with DGKL practice. Always read your result against your own lab's reference interval.

What insights will this test give you?

Your HbA1c expressed as an average glucose number, easier to relate to meter readings.
A sense of how your long-term sugar control compares with healthy targets.
Context for discussing diabetes risk or management with your doctor.

What can affect this result?

What can skew the result

eAG inherits the limits of HbA1c. Conditions that shorten red blood cell life, such as anaemia, recent blood loss, or certain haemoglobin variants, can make HbA1c and therefore eAG unreliable. It reflects an average and hides daily highs and lows.

Best interpreted with

Read alongside HbA1c itself and fasting glucose. eAG is most useful when interpreted with a clinician who knows your treatment targets.

How is this tested?

Sample

Calculated

Blood needed

Not applicable (calculated)

Method

Calculated ratio

Best timing

Same as its component test

Sources. The evidence behind this

Nathan DM et al. Translating the A1C Assay Into Estimated Average Glucose Values. Diabetes Care, 2008

NGSP: HbA1c and Estimated Average Glucose (eAG)

American Diabetes Association: eAG/A1C Conversion

Common questions

Which Aniva panels include this marker?

Core

Your annual full-body baseline with more than 100 biomarkers, included in your Aniva membership.