Points plus allowance calculator is used by weight watchers to calculate the required points of the food items they consume daily, based on age, weight and height.
DPm = Min{ Max{round[ ((ht-48)/2.25) + (wt×0.1834) – ((age-17)/4) ], 29} , 71}
DPf = Min{ Max{round[ ((ht-48)/2) + (wt×0.1461) – ((age-21)/5) – 5 ], 29} , 71}