Basal Metabolic Rate
This basal metabolic rate calculator uses the McArdle & Katch formula which is based on your lean mass.  It calculates your lean mass based on your weight and percentage body fat.  There is no entry for age or gender because the differences in resting metabolic rates in both of these cases can be attributed to the differences in lean mass.

Nutrient and Caloric Requirements For Fat Loss
The nutrient and caloric requirements estimator is designed to provide enough of the vital nutrients to keep you out of starvation mode while you are on an exercise program.  It is also designed to provide a caloric deficit even if you are performing little or no exercise.  When combined with regular exercise of the right duration, intensity, frequency, and type, it should provide between 1 and 2 pounds of fat loss per week.  It is not suitable for people who weigh less than 110 lbs, have a lean mass of less than 100 lbs, or have a percentage body fat of less than 3 percent.