start with 1670 cals a day. I recommend you also start off easy and keep your marcos about even. do that for a couple weeks then re weigh your self. take that number and again multiply by 10.. you should stay on track fairly easily. when you start to stall out then you can add a fat burning supplement like dexaprine or alphamine. these will help you stay motivated and help you burn a little bit of fat. by the time the fat burners effects start to dwindle after 4-6 weeks you should be getting close to your goal weight.. I would suspect you should be very happy in 10-12 weeks from now.