fluid calculation

How To 24 Hour Maintenance Fluid Calculation? 100 ml/kg/24-hours = 4 ml/kg/hr for the 1st 10 kg. 50 ml/kg/24-hours = 2 ml/kg/hr for the 2nd 10 kg. 20 ml/kg/24-hours = 1 ml/kg/hr for the remainder. How is fluid maintenance nursing calculated? What is the 4 2 1 rule for maintenance fluids? In anesthetic practice, this