3% thirst
3-5% dry membranes/less urine
5-7% sunk eyes and fontanelle
7-12% tent skin, no urine
12-15% shock

% dehydration X weight KG = fluid to replace in 1st 24 hours

Electrolyte replacement for deficit fluid:
Na+ 9 mEq/100cc deficit
K+ 6 mEq/100cc deficit
Cl- 6 mEq/100cc deficit