Mathematics of weight gain/loss

I’m aiming to lose14 lb (1 stone ) before 24 December 2011!! As I have always been one to apply science and math to things,  this represents my analysis of the situation.

Weight loss will take place if the Present Total Calorie Need (PTCN) is not met over some long period.

PTCN = Basal Metabolic Rate (BMR) + Activity Expenditure Requirement (AER)

Women: BMR = 655 + ( 4.35 x weight in pounds ) + ( 4.7 x height in inches ) – ( 4.7 x age in years )
Men: BMR = 66 + ( 6.23 x weight in pounds ) + ( 12.7 x height in inches ) – ( 6.8 x age in year )

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