Unfortunately it isn't easy to get an accurate number of calories per point, because fiber and fat is also factored into the formula.
For example, 1500 calories, 30 g of fat and 25 g of fiber is 27 points. If you drop the fiber down to 10 g, it raises to 30 points.
It is safe to say that it is somewhere in the ballpark of 50 calories per point, but over the course of a day, the fat and fiber can change your daily totals.
We're fat chicks, not doctors. Please see your physician before taking advice found on the internet.