Fluid Balance and Insensible Loss Calculator

Clinical context

Estimates net fluid balance for the selected observation period: (Total intake − measured outputs) − estimated insensible loss. Default model in this calculator: • Insensible loss ≈ 10 mL/kg/24h • Add 2.5 mL/kg/24h per each °C above 37°C • Reduce insensible component by one-third during humidified mechanical ventilation These insensible-loss coefficients are pragmatic bedside assumptions (not a universal standard) and can vary substantially with temperature, ventilator settings, burns, open wounds, gestational age, and ambient humidity. Use as an estimate and reassess with clinical context and serial trends.