How much water should a cat drink?

Cats need constant access to water. Proper hydration supports kidney function, urinary health, digestion and overall well-being. If your cat drinks too little or suddenly starts drinking much more than usual, it is important to pay attention.

How much water is normal?

On average, an adult cat needs around 40–60 ml of fluid per kilogram of body weight per day:

• 3 kg cat: 120–180 ml per day
• 4 kg cat: 160–240 ml per day
• 5 kg cat: 200–300 ml per day

Why real-life numbers may vary

The figures above refer to the total daily fluid intake, not just the water your cat drinks from a bowl.

Several factors can affect this:

• Diet. Cats that eat wet food get part of their fluid from meals. Cats on dry food usually drink more from their bowl.
• Weather and activity. In hot weather, warm indoor temperatures or after active play, cats may drink more than usual.
• Age. Kittens, senior cats, pregnant cats and nursing cats may have different hydration needs than healthy adult cats.

How to tell if your cat is drinking too little

Pay attention if your cat:

• rarely goes to the water bowl
• urinates less than usual
• seems lethargic
• eats less
• prefers drinking from the tap but ignores the bowl
• has dry gums

How to help your cat drink more

• Place several water bowls around the home. Many cats drink more when water is available in different rooms.
• Change the water daily. Fresh water is usually more appealing.
• Choose the right bowl. Many cats prefer wide bowls where their whiskers do not touch the sides.
• Try a cat fountain. Moving water often attracts cats more than still water.
• Add wet food. An easy way to increase total fluid intake.

What kind of water should you give a cat?

Cats should only be offered clean, fresh water with no odor or unusual taste. It should be replaced daily. Good-quality filtered or bottled water is often the best option.

When to see a veterinarian

If your cat drinks far too little or too much, urinates frequently, loses weight or seems lethargic, do not delay seeking veterinary advice.

Pay attention not only to the water bowl, but to your cat’s overall behavior as well. A steady interest in drinking is an important sign of good health.