Dear Marie: I decided to recheck my calculations re: glucose water. (This information is not in the usual sources for nutritional information). The source of my information is the ADA diet manual To determine the grams sugar in 4 oz of 5% glucose in water, multiply .05 x 120cc = 6.0 gram. To figure out calories, multiply 4 cal per gram glucose. So, 120 cc dextrose water would provide 24 (not the 20 I quoted) calories. (I had multiplied by 3.4 cal per gram since that is what we were taught to do for IV dextrose. I see that the monohydrated form of sugar used in IV dextrose solution provides 3.4 cal per gram while ingested carbohydrate provides 4 cal per gram). Maybe someone else knows more about this stuff than I do. Working with outpatients, I calculate IV solutions once every 4-5 years..... Hope this helps. Martha Grodrian Brower, NOT the Queen of IV Nutritional Support