The hourly maintenance fluid rate should be calculated according to the formula of Holliday and Segar.

Body weight

Fluid required

0-10 kg

4 ml/kg/h

11-20 kg

40 ml/h plus 2 ml/kg/h for every kg over 10 kg

>20 kg

60 ml/h plus 1 ml/kg/h for every kg over 20 kg

Table 1 Calculation of normal maintenance fluid requirements in children