Also see a nutrionist or designated healthcare professional at your cancer center, most comprehensive ones have one to go over your nutritional needs before, during and after treatment. Here is an USDA interactive guide that is used by healthcare professionals for your daily required intake based on sex, age, height, weight, activity. These could be more or less based on other medical conditions such as treatment, surgery, recovery, illness, but gives you an idea. Most will be surprised water requirement is more than what one would think, drink, and basically comes down to 1/2 ounce liquids for every pound of weight, plus more for activity, elevation, humidity, etc. Mine is about 128 ounces per day on this, and several other water calculators. They say 20% water may come come foods, but the rest by liquids. Protein intake may be higher, some say 1/2 gram per pound of weight, others one gram of protein per pound of weight per day. Water helps flush the Cisplatin from the kidneys.

http://fnic.nal.usda.gov/fnic/interactiveDRI/