Baseline

1 day of age

50 ml/kg/d
  2 days of age 75 ml/kg/d
  >3 days of age 100 ml/kg/d
  < 10 kg 100 ml/kg/d
  10-20 kg 1000 ml/d + 50 ml/kg/d for every kg > 10
  > 20 kg 1500 ml/d = 20 ml/kg/d for every kg > 10
Factors that decrease requirements Humidified gases X 0.75
  Paralysis X 0.7
  High ADH (vented or coma) X 0.7
  Hypothermia -12% per °C core temp is < 37 °C
  High ambient humidity X 0.7
  Renal failure X 0.3 (+urine output)
Factors the increase requirements Full activity and oral feeds X 1.5 / free fluids
  Fever +12% per °C core temp is > 37 °C
  Room temp over 31 °C +30% per °C
  Hyperventilation X 1.2
  Preterm Neonate (< 1.5 kg) X 1.2
  Radiant heater X 1.5
  Phototherapy X 1.5
  Burns day 1 + 4% per 1% of body surface area affected
  Burns day 2 +2 % per 1% of body surface area affected

*From Handbook of Pediatric Intensive Care by Gale Pearson