[xMenace]

Are you trying to develop an insulin:carb ratio? Most of us would not say we had a normal dose of n units. We'd say we took n units for every 10 grams of carbs.

Same goes with corrections. For the sake of math, 10g of carbs translates to 2.8 mmol/l or 50 mg/dl. So if you took 1 unit to treat 10g of carbs, you would then take 1 unit to drop your BGs 2.8 mmol/l.

Pizza and Chinese are very difficult to guage as per what Gary said. Figure your ratios using measured slices of whole wheat bread, then get to work on the pizza timing.