This link provides the best Body weight simulator I have seen on the net.
It is provided by the National Institute for Diabetes and Digestive and Kidney Diseases (National Institute for Health).
The Fatsecret calculators are too generous with the RDI calories. Sure you will loose weight if you stick to their RDI but VERY slowly.
I did NOT Compare the Calories burned bu activity level (Fatsecret vs NIDDK) but I will at a later stage.
Regardless of which calculator you use. If you stick to your plan and don't give when you fall off that horse (and we all do). you will reach your weight goals.
Mind over Matter!
Don't Diet..Change your way of living!