For maintenance fluids, enter only the weight.
References:
Boineau FG and Lewy JE: Estimation of Parenteral Fluid Requirements. Pediatric Clinics of North America 1990; 37(2):257-321.
Feld LG, Kaskel FJ, and Schoeneman MJ: The Approach to Fluid and Electrolyte Therapy in Pediatrics. Advances in Pediatrics 1988; 35:497-536.
Sieberry GK and Iannone R. The Harriet Lane Handbook. Mosby: St. Louis, 2000.