Pet Hydration Calculator — Free Daily Water Needs | PetHealthCalc

Calculate daily water intake for dogs and cats for free in 3 seconds. No login required. Prevent dehydration and kidney issues.

Guide

Hydration is essential for kidney function, digestion, and temperature regulation—especially for cats with a low thirst drive.

This tool turns body weight and diet type (dry vs wet) into a daily water target in just 3 seconds for free.

No login required. Track hydration easily and use the Calorie Calculator when changing your pet's diet.

How to Use

  1. Weigh your pet and enter the weight in kilograms or pounds.
  2. Select the primary type of diet your pet consumes (Dry or Wet food).
  3. Note that wet food contains significant moisture, reducing the need for additional water.
  4. View the recommended daily water intake in milliliters and liters.

Frequently Asked Questions

How much water does my pet need?

On average, a pet needs roughly the same number of milliliters of water as they need calories. For a 10kg dog, this is about 600ml per day.

Does wet food provide hydration?

Yes. Canned wet food is about 75-80% water. Pets on a purely wet food diet will often drink much less from their bowl than those on dry kibble.

What are signs of dehydration in pets?

Signs include lethargy, dry or tacky gums, sunken eyes, and a 'skin tent' (where skin on the back stays up when pinched).