Choose which test you have a result for, then enter the number to see its category.
eAG = 28.7 × A1C − 46.7 mg/dL. Informational only — not medical advice.
A single reading — especially fasting glucose — can be affected by recent food, stress, illness, or timing. Diagnosis requires repeat testing and a doctor's interpretation. This tool is for general reference only, not a diagnosis.
Reference ranges: American Diabetes Association, Standards of Care in Diabetes.
| Category | Fasting Glucose | A1C |
|---|---|---|
| Normal | Below 100 mg/dL | Below 5.7% |
| Prediabetes | 100–125 mg/dL | 5.7%–6.4% |
| Diabetes range | 126 mg/dL or higher | 6.5% or higher |
Fasting glucose results are classified using ADA-style bands: under 100 mg/dL is considered normal, 100 to 125 mg/dL falls in the prediabetes range, and 126 mg/dL or above is in the diabetes range — these are commonly cited screening thresholds, not a diagnosis.
A1C, a blood test reflecting average blood sugar over roughly the past three months, uses its own bands: under 5.7% is normal, 5.7% to 6.4% is prediabetes, and 6.5% or above is in the diabetes range.
Estimated average glucose (eAG) converts an A1C percentage into an equivalent average glucose figure using the formula eAG = 28.7 × A1C − 46.7 mg/dL, which is the standard published conversion used to relate the two measurements. All figures here are informational only, not a diagnosis — blood sugar interpretation should always involve a healthcare professional.
No — it applies commonly cited ADA-style screening bands to the numbers you enter, purely for informational purposes. An actual diagnosis requires a healthcare professional's assessment, often with repeat testing.
Fasting glucose is a single blood sugar reading taken after not eating for a period of time. A1C reflects your average blood sugar over roughly the past three months, making it a longer-term picture rather than a single-moment snapshot.
Using the standard published formula eAG = 28.7 × A1C - 46.7 (in mg/dL), which converts the A1C percentage into a glucose-equivalent number that's easier to compare against day-to-day glucose readings.
No — this tool applies standard reference bands to numbers you already have, for general information only. Any concerns about your blood sugar results should be discussed with a healthcare professional.