A1C Calculator : Hemoglobin A1C to Blood Glucose Converter
Our A1C Calculator converts between A1C and blood glucose levels. A1C shows average blood sugar over 2-3 months. Levels: below 5.7% normal, 5.7-6.4% prediabetes, above 6.5% diabetes. Use our calculator to convert between HbA1c and estimated average glucose (eAG) values.
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A1C Conversion Chart and Calculator
Your A1C test result (also known as HbA1c or glycated hemoglobin) can be a good gauge of your diabetes control because it provides an estimated average blood glucose level over the past few months.
Unlike daily blood glucose test results, which are reported as mg/dL, A1C is often reported as a percentage, which can make it difficult to understand the relationship between the two values.
| A1C (%) | eAG (mg/dL) |
|---|---|
| 4.0 | 68 |
| 5.0 | 97 |
| 5.5 | 111 |
| 6.0 | 126 |
| 6.5 | 140 |
| 7.0 | 154 |
| 7.5 | 169 |
| 8.0 | 183 |
| 8.5 | 197 |
| 9.0 | 212 |
| 9.5 | 226 |
| 10.0 | 240 |
Note: Use this information to become more familiar with the relationship between A1C and eAG values and help improve discussion of glucose control with your doctor. Never use it as a basis for changing your disease management on your own.
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A1C Level Reference Guide
Understanding different A1C ranges and their implications for diabetes management.
Normal Range (4.0% - 5.6%)
Normal A1C levels indicate good blood sugar control.
Prediabetes Range (5.7% - 6.4%)
Prediabetic range - lifestyle changes are recommended.
About A1C Calculator
A1C Calculator provides free tools to convert between A1C and blood glucose values (mg/dL and mmol/L) and to explore related charts.
- Built for people living with diabetes who track HbA1c or estimated average glucose.
- Helpful for individuals with prediabetes and anyone who wants to monitor blood sugar trends.
- Educational only — not a substitute for personalized diagnosis, treatment, or medical advice.
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