This is from the Starting Strength FAQ:
http://forum.bodybuilding.com/showpo...p;postcount=32
You need to find out your BMR (Base Maintainance Rate) and then eat a little lower than that to lose weight. BMR greatly depends on your LBM (lean body mass) though, and you are very heavy for your height which could either mean that you are very overweight or extremely strong, or both. It will skew the results of the online calculators. The only accurate way to find out your BMR would be to weigh yourself regularly and keep an accurate record of your calorie intake and then watch if you maintain your weight or not.
I'm guessing that 2000-2500 calories a day should be fine.