A1C to Average Glucose Calculator (ADAG)
Convert HbA1c to estimated average glucose.
Enter your values
Enter the hba1c in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Estimated average glucose
- 154 mg/dL
- In mmol/L
- 8.6
Quick answer
The ADAG formula converts HbA1c percentage into estimated average glucose in mg/dL over the preceding 2-3 months.
eAG (mg/dL) = 28.7 x A1C - 46.7
At a glance
| What it does | Convert HbA1c to estimated average glucose. |
|---|---|
| Category | Health |
| Inputs needed | HbA1c |
| Main output | Estimated average glucose |
| Formula | eAG (mg/dL) = 28.7 x A1C - 46.7 |
| Cost | Free — no sign-up, no download |
How to use the A1C to Average Glucose Calculator (ADAG)
- 1Enter your most recent HbA1c percentage from a lab test.
- 2The ADAG formula was derived from real continuous glucose monitoring studies correlated with A1C.
- 3This is for educational context only — discuss your results and targets with your healthcare provider.
Inputs explained
- HbA1c(%)
- Enter the hba1c in %.
Worked example
Using the values the calculator loads with:
Inputs
- HbA1c7.0 %
Results
- Estimated average glucose154 mg/dL
- In mmol/L8.6
Frequently asked questions
Is eAG the same as a fasting glucose reading?
No — it represents an average over roughly 2-3 months, not a single-point reading.
What A1C is considered diabetic?
Generally 6.5% or higher indicates diabetes, but diagnosis should be confirmed by a clinician.
What do I need to enter into the A1C to Average Glucose Calculator (ADAG)?
Just 1 value: hba1c. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the A1C to Average Glucose Calculator (ADAG) work out the answer?
The ADAG formula converts HbA1c percentage into estimated average glucose in mg/dL over the preceding 2-3 months. It applies the formula eAG (mg/dL) = 28.7 x A1C - 46.7 and shows the working so you can check each step by hand.
Is the A1C to Average Glucose Calculator (ADAG) free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.