Dog Fluid Rate Calculator
Calculate intravenous fluid requirements and drip rates for canine patients.
Kilograms (kg)
Pounds (lbs)
10 (Macro)
15 (Standard)
20 (Standard)
60 (Micro/Pediatric)
Maintenance Volume (24h):
0 ml
Dehydration Deficit:
0 ml
Total Volume (for selected time):
0 ml
Hourly Infusion Rate:
0 ml/hr
Drip Rate:
0 drops/min
Drip Timing:
1 drop every 0 sec
How to Calculate Fluid Rates for Dogs
Fluid therapy is a cornerstone of veterinary medicine, used to treat dehydration, maintain organ perfusion, and replace electrolyte losses. Calculating the correct rate involves three primary components: Maintenance, Deficit, and Ongoing Losses.
The Three-Step Formula
- Maintenance: This is the fluid required by a healthy dog to function. A common formula is 60ml per kg per day (ml/kg/24h). For more precise veterinary clinical work, the RER-based formula (70 * Weight^0.75) is often used.
- Dehydration Deficit: Calculated by multiplying the dog's body weight by the estimated percentage of dehydration. (e.g., 10kg dog x 5% dehydration = 0.5kg or 500ml deficit).
- Ongoing Losses: Estimated volume lost through vomiting, diarrhea, or polyuria.
Fluid Rate Example
If you have a 20kg dog that is 6% dehydrated with 200ml of estimated ongoing losses:
- Maintenance: 20kg x 60ml = 1,200ml
- Deficit: 20kg x 0.06 x 1000 = 1,200ml
- Losses: 200ml
- Total 24h Volume: 2,600ml
- Hourly Rate: 2,600ml / 24 hours = 108.3 ml/hr
Common Drop Factors
To convert the hourly rate into a physical drip rate (drops per minute), you must know your IV set's "Drop Factor":
- Macro-drip: 10 or 15 gtt/ml (used for medium to large dogs).
- Micro-drip: 60 gtt/ml (used for small dogs or precise delivery).
Disclaimer: This calculator is for educational purposes for veterinary professionals and students. Always consult with a licensed veterinarian before administering fluids to any animal.