A1c to average glucose chart

This chart lists common A1c results alongside the estimated average glucose (eAG) each one corresponds to, in both mg/dL and mmol/L. The figures come from the ADAG study formula: eAG (mg/dL) = 28.7 × A1c − 46.7.

A few things worth keeping in mind when reading a chart like this:

• eAG reflects an average over roughly the past 2–3 months, not a single moment in time.
• Two people with the same A1c can have different day-to-day glucose patterns — one might run steady, another might swing between highs and lows that average out to the same number.
• Certain conditions affecting red blood cells can shift how accurately A1c reflects true average glucose for a given person.

If you'd rather enter your own exact A1c value and get an instant conversion (including a mg/dL ↔ mmol/L toggle), use the calculator below instead of scanning the table.