That's about right, Ed, from my prior calculations for myself. it's recommended half your body weight in liquid ounces, plus to increase it for others factors like exercise, elevation, activity level, heat waves, sickness, pregnancy, health to add more. 20% of the liquid ounces can be through food. Caffeine, alcohol, may not count, since these are diuretics, and have to drink more water drinking these due to the frequent urination. With chemo you need more water to flush the toxins out of the kidneys. Excess protein can cause stress on the organs, especially kidneys, and ketones are flushed out in the urine, which can cause dehydration. There are a few water apps on iPad, on the net by searching water calculators.