eAG blood test
Estimated average glucose
In short
A typical adult eAG result is 68 to 114 mg/dL (A1C 4.0–5.6%). A high eAG simply mirrors a high A1C. The prediabetes range starts near 117 mg/dL (A1C 5.7%), and the range used for diabetes near 140 (6.5%). Always read your result against the range printed on your own report.
Your A1C, turned into an average blood sugar number.
eAG is not a separate test. The lab calculates it from your A1C with a standard formula. It shows your average blood sugar in the same units as a glucose test.
Is my eAG high or low?
Type your result to see where it sits.
Nothing you type leaves this device.
Typical range
| For | Range | Unit |
|---|---|---|
| Adults · A1C 4.0–5.6% | 68–114 | mg/dL |
| Adults · A1C 4.0–5.6% | 3.8–6.3 | mmol/L |
Typical ranges for adults. Labs differ a little, so the range printed next to your result is the one to go by.
If your eAG is high
A high eAG simply mirrors a high A1C. The prediabetes range starts near 117 mg/dL (A1C 5.7%), and the range used for diabetes near 140 (6.5%).
Common reasons
- Low iron, which can make A1C, and so eAG, read higher
- Steroid medicines and some other medicines
- Insulin resistance, when the body responds less to insulin
- Prediabetes or diabetes
If your eAG is low
A low eAG simply mirrors a low A1C. It most often means red blood cells are living shorter lives than usual.
Common reasons
- Recent blood loss or a blood transfusion
- Pregnancy, when A1C often runs lower
- Conditions that break down red blood cells faster
- Less often: an inherited hemoglobin type or advanced kidney disease
What can throw it off
Because eAG is calculated from A1C, anything that skews A1C skews eAG too.
Questions to take to your appointment
- 1What is my A1C, and which range does it fall in?
- 2Does my eAG match my usual glucose readings?
Read together with
Doctors rarely read eAG alone. These usually sit next to it.
Quick answers
What is the eAG blood test?
eAG (Estimated average glucose): Your A1C, turned into an average blood sugar number. eAG is not a separate test. The lab calculates it from your A1C with a standard formula. It shows your average blood sugar in the same units as a glucose test.
What is a normal eAG level?
For most adults, eAG is typically 68 to 114 mg/dL (A1C 4.0–5.6%). Some countries print it in mmol/L, so check the unit first. Labs differ a little, so the range printed next to your result is the one to go by.
What does a high eAG mean?
A high eAG simply mirrors a high A1C. The prediabetes range starts near 117 mg/dL (A1C 5.7%), and the range used for diabetes near 140 (6.5%). Common reasons include low iron, which can make A1C, and so eAG, read higher; steroid medicines and some other medicines; insulin resistance, when the body responds less to insulin; and prediabetes or diabetes. A doctor reads it together with your other results and how you feel.
What does a low eAG mean?
A low eAG simply mirrors a low A1C. It most often means red blood cells are living shorter lives than usual. Common reasons include recent blood loss or a blood transfusion; pregnancy, when A1C often runs lower; conditions that break down red blood cells faster; and less often: an inherited hemoglobin type or advanced kidney disease.
What can affect my eAG result?
Because eAG is calculated from A1C, anything that skews A1C skews eAG too.
What should I ask my doctor about my eAG?
Questions worth taking to the appointment: What is my A1C, and which range does it fall in? Does my eAG match my usual glucose readings?
What this page can’t do
It reads each number on its own.
Doctors read results together — ALT with AST, ferritin with hemoglobin, TSH with free T4. A pattern says more than any single flag.
It doesn't know you.
Your age, your medicines, how you feel and your last result all change what a number means.
It doesn't remember.
Close this page and your results are gone. That's on purpose: nothing was ever sent to us.
We also make Vita: Health Coach, an app for those parts. It reads your whole report with your medicines and history in mind, answers follow-up questions in plain words, and keeps your reports in one place — for you and for the people you look after.
Vita: Health Coach on the App StoreSources
Stuck on a word? See the medical words. How we choose our sources. More about Vita Health Coach.