How to read this chart
Find your A1C percentage in the left column, and then read across to your estimated average glucose in the unit your meter uses. A 6.5% A1C corresponds to about 140 mg/dL (7.8 mmol/L), 7.0% to 154 mg/dL (8.6 mmol/L), and 8.0% to 183 mg/dL (10.2 mmol/L). The A1C values are color-coded, green for the normal range, amber for prediabetes, red for the diabetes range, so you can see at a glance where a result lands.
- Locate your A1C percentage in the left column.
- Read across to your estimated average glucose in mg/dL, or scan the third column for mmol/L.
- Check the row color to see which clinical range your result falls in.
- For values between the listed rows, use the interactive A1C calculator, or remember that each full A1C point equals 28.7 mg/dL.
The chart works in reverse too. If your average glucose is 180 mg/dL, scanning the middle column puts your estimated A1C just under 8.0%. Because the conversion is linear, each full A1C percentage point equals 28.7 mg/dL of average glucose, a handy rule of thumb for values between rows. For an exact number on any value, use the interactive A1C calculator.
The formula behind the chart
Every value in this table comes from the ADAG study equation: eAG (mg/dL) = 28.7 × A1C − 46.7, with mmol/L found by dividing by 18.0182. This is the same conversion the American Diabetes Association publishes in its official eAG tables, so the numbers here match the chart hanging in your clinic. New to the terminology? The what is A1C guide explains what the test measures and why it reflects three months of blood sugar.
A1C to eAG chart: frequently asked questions
What is the A1C to average glucose chart?
An A1C to average glucose chart converts hemoglobin A1C percentages into estimated average glucose (eAG) using the ADAG formula eAG = 28.7 × A1C − 46.7. For example, 6% ≈ 126 mg/dL, 7% ≈ 154 mg/dL, and 8% ≈ 183 mg/dL.
What is 6.5 A1C in eAG?
An A1C of 6.5% converts to an estimated average glucose of about 140 mg/dL (7.8 mmol/L) using the ADAG formula.
What is 7.0 A1C in average glucose?
An A1C of 7.0% converts to an estimated average glucose of about 154 mg/dL (8.6 mmol/L).
How do I convert A1C to mmol/L?
First convert A1C to mg/dL using eAG = 28.7 × A1C − 46.7, then divide by 18.0182 to get mmol/L.
What is the formula behind this A1C to eAG chart?
Every row is generated with the ADAG formula: eAG (mg/dL) = 28.7 × A1C − 46.7, with mmol/L found by dividing by 18.0182. Because the relationship is linear, each full A1C point equals 28.7 mg/dL of average glucose.
Is this the same A1C chart the ADA uses?
Yes. The ADAG conversion behind this chart is the same one the American Diabetes Association publishes in its official eAG tables, so these values match the chart your clinic uses.
Key takeaways
- Every row uses the ADAG formula: eAG (mg/dL) = 28.7 × A1C − 46.7, with mmol/L found by dividing by 18.0182.
- Because the conversion is linear, each full A1C percentage point equals 28.7 mg/dL of average glucose.
- Anchor values worth remembering: 5.7% equals 117 mg/dL, 6.5% equals 140 mg/dL, and 7.0% equals 154 mg/dL.
- The chart works in both directions: find your A1C to read eAG, or scan the glucose column to estimate A1C.
- This table is an estimate, not a lab result. Confirm any clinical decision with your healthcare professional.
Conclusion
An A1C to eAG conversion chart turns a lab percentage into the everyday glucose numbers you see on your meter, and the ADAG formula keeps every value consistent with the chart your clinic uses. Bookmark this table for quick lookups, and when you have a value between rows, run it through the interactive A1C calculator for an exact answer. The number only matters once you act on it, so bring your results to your care team and use them to guide your next steps.
Related tools
Convert any single value with the A1C calculator, learn what the test means in the what is A1C guide, or translate CGM readings with the GMI to A1C calculator.