mrburden wrote
Using the chart here:
http://www.rajeun.net/HbA1c_glucose.html
it looks as if a reading of 72 equates to an HBA1C of 4.2 with an average blood glucose level of about 4.0 mml
Unfortunately you
a) used the reading of 72 as if it was mg/dl, and not mmol/l
b) confused an HbA1c of 72 mmol/l with an average blood sugar level of 72 mmol/l
I'm sure you won't repeat your mistake. I'd ditch that other converter. It's all here, as you know.
Geoff
ps if the Duchess had an HbA1c of 4.2 we'd all be beating a path to her doorway, and asking her how she did it !