Dog Water Intake Calculator
Estimate how much water your dog should drink each day from its weight.
About the Dog Water Intake Calculator
Enter your dog's weight, diet and activity level. The calculator gives a daily water range in litres and fluid ounces.
A commonly used veterinary guideline is about 50–60 mL of water per kg of body weight per day, roughly 1 fl oz per lb. Dogs need more in heat, after exercise, when nursing or on dry food, and less on wet food. Drinking much more than about 100 mL/kg a day can be a sign of diabetes, kidney disease or other conditions.
The formula
Water ≈ 50–60 mL × body weight (kg) per day
Worked example
A 40 lb (18.1 kg) dog on dry food, normal activity
- 50–60 mL × 18.1 kg
- = 0.91–1.09 litres (31–37 fl oz) a day
Questions people ask
How much should a 20 kg dog drink?
About 1–1.2 L a day.
My dog drinks a lot more. Why?
Heat and exercise, or illness; see a vet if it's sudden.