Andy is right, not only is age, height, and weight a factor but also what type of CAH your child has, weighs into this factor. CAH due to 21 hydroxylase deficiency, 17 hydroxylase, late onset, salt wasting...... You could probably get a ballpark figure by indicating all this information. But you must remember, that every child and every endocrologist is different. My daughter is a salt waster with 21 hydroxylase deficiency. She is three weighing in at about 29 lbs., 38 inches. She takes 2.5 mg Cortef in the a.m., 2.5 in the afternoon, 2.5 in the p.m. She also takes half a pill of Florinef in the a.m. and half in the p.m. Last visit we were undersurpressed. Her meds were upped. We will know in thirty days if we are back in a good range. Andy, that was my dream the day I found out my daughter had this disease. I said I hoped for a child that would make a difference in the world when I was pregnant. I laugh to myself when I suggest that she will find a cure. I don't have too high of an expectation for her? I wish there was some more research done for CAH too.