Veterinary Dehydration Fluid Plan Calculator

Replacement volume from percent dehydration, plus maintenance and ongoing losses. Not a mcg/kg/min converter.

Formula

Deficit (mL) = % dehydration × BW(kg) × 10
  because 8% of 10 kg = 0.8 kg = 800 mL.

Maintenance (mL) = mL/kg/day × BW × (hours / 24)
Total = deficit + maintenance + losses
Rate (mL/hr) = total / hours

Allometric option (not the default here): dog ~132 × BW^0.75 mL/day;
cat ~80 × BW^0.75 mL/day. Shock boluses are a separate decision.

References

1. DiBartola SP, Bateman S. Introduction to fluid therapy. In: DiBartola SP, ed. Fluid, Electrolyte, and Acid-Base Disorders in Small Animal Practice. Deficit = % dehydration × BW × 10 (mL).
2. Davis H, et al. 2013 AAHA/AAFP fluid therapy guidelines for dogs and cats. J Am Anim Hosp Assoc. Maintenance ranges and replacement over time.

Veterinary education only. Not a prescription. Confirm doses and volumes with the attending clinician and current formularies before use.