http://registrar.stanford.edu/students/finances/
11,600 per qaurter, for classes. 3 quarters is typical year. so 34,800 in tuition.
http://daily.stanford.edu/article/2008/2/19/graduateHousingCostMayIncrease
indicates about $640 per month is on the cheap side for housing. ~8000 in housing. Probably another ~8000 in expenses. These are all on the very conservative side.