What is the standard maintenance fluid rate for dogs and cats?

A common maintenance rate is 2–4 mL/kg/hr for both dogs and cats under anesthesia, and roughly 40–60 mL/kg/day (about 1.7–2.5 mL/kg/hr) for hospitalized patients. Always follow the attending veterinarian's prescription.

Which drip set should I use?

Macro-drip sets (10–20 drops/mL) are standard for larger patients and faster flow rates. Micro-drip sets (60 drops/mL) are preferred for cats, small dogs, or any situation requiring precise low-volume infusion.

How do I count drops per minute manually?

Watch the drip chamber and count the number of drops that fall in 15 seconds, then multiply by 4 to get drops per minute. Adjust the roller clamp until the counted rate matches the calculated target.

Does this calculator account for dehydration correction boluses?

No. This tool calculates a steady-state infusion rate only. Rehydration boluses and deficit corrections should be calculated separately and added to the maintenance rate as prescribed by the veterinarian.

Can I use pounds instead of kilograms?

Yes. Select "lb" in the weight unit toggle and the calculator will convert to kg internally before computing the fluid volumes.

Pet IV Drip Rate Calculator

Name: Pet IV Drip Rate Calculator
Availability: InStock
Author: Nham Vu

Enter patient weight, fluid rate, and drip set size to calculate IV drops per minute and mL/hr for dogs and cats.

Patient & Fluid Parameters

Body Weight

Prescribed Fluid Rate (mL/kg/hr)

Typical maintenance: 2–5 mL/kg/hr

Drip Set Size (drops/mL)

10 gtt/mL (macro) 15 gtt/mL (macro) 20 gtt/mL (macro) 60 gtt/mL (micro)

Results

Enter values and click Calculate

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Summary

Enter patient weight, fluid rate, and drip set size to calculate IV drops per minute and mL/hr for dogs and cats.

How it works

Enter the patient's body weight in kilograms or pounds.
Input the prescribed fluid rate in mL/kg/hr (e.g., maintenance is typically 2–5 mL/kg/hr).
Select the drip set size: 10, 15, 20, or 60 drops/mL.
The calculator multiplies weight × rate to get mL/hr.
It then divides mL/hr by 60 and multiplies by the drip factor to give drops per minute.
Results update instantly with every input change.

Use cases

Setting up a gravity-feed IV line for a dog or cat in a clinic without an infusion pump.
Cross-checking an infusion pump setting against a manual drip count.
Teaching veterinary students how to calculate fluid therapy rates.
Adjusting fluid rates for dehydrated or post-surgical patients in real time.
Calculating maintenance fluids for hospitalized small animals.
Verifying drip rates during anesthesia and recovery monitoring.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu