Calories to cut

I have a question about cutting. In order to cut you have to create a calorie deficit from your calorie maintenance. If you drop to many calories your body will go in to a starvation mode correct? Is there a calculation to give you an estimate of how many calories you should drop from your diet a day?

Thanks

yeah stickies :D
read em all k?

i dont count calories i think its working and not all calories are created the same read em stickies