I nursing school, I was always taught to multiply by 18 to get the A1C to plasma blood glucose average, but another member, CarolynC posted a more accurate conversion:

To convert a HbA1c value to blood plasma glucose in mg/dl, the conversion formula is:

Plasma Blood Glucose = (HbA1c * 35.6) - 77.3

So....according to this conversion, an A1C of 7 would translate out to 171.9, so it seesm that the geocities site is the more accurate of the two.

Personally, I'm shooting for an A1C of 5 or less (100.7) which may be quite doable since my last was 5.3 (111.38).