Work out oral rehydration solution instantly with clear inputs, formula shown and shareable results.
Compares the weight-based fluid deficit with the WHO Plan B figure of 75 mL/kg over four hours and uses the larger volume.
WHO Plan B
ORS volume = 75 mL/kg over 4 hours for some dehydration; deficit (mL) = weight (kg) x 1000 x dehydration fraction
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Per litre: 2.6 g sodium chloride, 13.5 g glucose, 1.5 g potassium chloride and 2.9 g trisodium citrate.
In shock, persistent vomiting, ileus or altered consciousness, where intravenous rehydration is needed.