Glycemic markers calculators
Glycemic markers calculators — 3 tools, each showing the formula it uses, the source that published it, and the date that source was last checked.
A1C calculator
An A1C calculator converts a hemoglobin A1C percentage into an estimated average glucose, in both mg/dL and mmol/L, using the ADA equation eAG = 28.7 x A1C - 46.7 published by Nathan in 2008. It converts in either direction, shows IFCC units, and states which range the ADA defines your figure as falling in.
PopularGlucose to A1C calculator
This converts an average blood glucose reading into the A1C percentage it corresponds to, by inverting the ADA equation from the ADAG study. Enter a meter or CGM average in mg/dL or mmol/L and it returns the equivalent A1C in both NGSP percent and IFCC units, with the ADA range named.
GMI calculator
GMI estimates what an A1C would look like given your CGM mean glucose, using the equation GMI = 3.31 + 0.02392 x mean glucose from Bergenstal 2018. Enter your mean glucose and, optionally, your laboratory A1C to see the gap between them, which the paper treats as informative rather than an error.
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