A1C to Average Glucose Calculator (ADAG)
Convert HbA1c to estimated average glucose.
Enter your values
ⓘ Live results
Results
- 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
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.
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.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.