This study compared two methods of calculating the energy needs of children with CP: the traditional method, using RDA for chronological age; and the Krick method, which calculates the BMR and includes factors for muscle tone, movement or level of activity, and energy requirements for normal and catch-up growth. 30 tube-fed children, aged between nine months and 18 years, who were inpatients for longer than one week at the Kennedy Institute, were reviewed. 14 were female. They were weighed at admission and discharge to evaluate the rate of growth; calorie prescriptions at discharge were based on the clinical course. The Krick method was found to be a more potent predictor of the discharge prescription than the RDA method.