A1C to Blood Sugar Converter
Convert an A1C percentage to estimated average glucose and back with the ADA eAG formula, in mg/dL and mmol/L, with normal and diabetes ranges.
O A1C to Blood Sugar Converter
The A1C to Blood Sugar Converter translates an A1C percentage into an estimated average glucose (eAG) and back again, in both mg/dL and mmol/L. A1C reflects the share of haemoglobin that has become glycated, which tracks your average blood sugar over roughly the previous two to three months — far longer than any single finger-stick reading.
The conversion uses the American Diabetes Association formula from the A1C-Derived Average Glucose (ADAG) study: eAG (mg/dL) = 28.7 × A1C − 46.7, and eAG (mmol/L) = 1.59 × A1C − 2.59. So an A1C of 7% corresponds to an average glucose of about 154 mg/dL or 8.6 mmol/L.
The tool also shows which diagnostic band an A1C falls into: below 5.7% is normal, 5.7% to 6.4% is the prediabetes range, and 6.5% or above is the diabetes range. This is an educational calculator, not medical advice — testing, diagnosis and treatment decisions belong with your healthcare provider.
Jak korzystać z A1C to Blood Sugar Converter
- Choose whether you are converting an A1C into average glucose, or average glucose into an A1C.
- Enter your A1C percentage, or your average blood glucose reading.
- If entering glucose, pick mg/dL or mmol/L.
- Read the converted value in both glucose units.
- Check which A1C band the result falls into.