Enter an A1C result to see the estimated average glucose it corresponds to — or work backwards from a glucose value to the A1C it implies.
A1C to Average Blood Sugar Converter
Converts an A1C result into estimated average glucose (eAG), and back again.
How this works: eAG (mg/dL) = 28.7 × A1C − 46.7, the formula from the A1c-Derived Average Glucose study. Limits worth knowing: eAG is an estimate of a long-term average and says nothing about your daily peaks and dips. A1C itself can read falsely low with anemia, recent blood loss or pregnancy, and falsely high with iron deficiency; some hemoglobin variants interfere with certain assays entirely. If your A1C and your meter readings disagree, tell your doctor rather than assuming one is wrong.
Related reading
What each number means, and what a surprising result does and does not tell you, is covered in what is a normal blood sugar level. If your result sits in the prediabetes range, the evidence on reversing it is unusually strong — see can you reverse prediabetes and how to lower blood sugar naturally.
These calculators are for general education and are not medical advice or a diagnosis. Always discuss your own numbers with your doctor.