Does it seem as though your cat drinks very little? That is not necessarily abnormal. A significant part of its water intake may come directly from food, especially if it eats wet food. What matters is therefore your cat’s total water intake, not only the level in its bowl.
As a general reference, veterinary guidance places a cat’s daily water requirement at around 50 ml of water per kilogram of body weight per day. This total includes both the water your cat drinks and the water contained in food. Actual needs can vary with diet, temperature, activity, age and health.
How much water should a cat consume according to its weight?
Using approximately 50 ml/kg/day as a reference gives the following rough figures:
| Cat’s weight | Indicative total water intake |
|---|---|
| 3 kg | about 150 ml/day |
| 4 kg | about 200 ml/day |
| 5 kg | about 250 ml/day |
| 6 kg | about 300 ml/day |
These figures are guidelines, not an amount your cat must necessarily drink from its bowl. A 4 kg cat eating wet food may receive a large part of its roughly 200 ml daily total directly from its meals.
Water contained in food counts too
This is one of the main reasons why two cats of the same weight can have very different drinking habits.
Wet foods can contain a high proportion of water, whereas dry food contains much less. A cat fed mainly wet food may therefore appear to drink very little while still obtaining a significant amount of water from meals. By contrast, a cat fed mostly dry food generally has to meet a larger share of its needs by drinking.
Before worrying because the water level in the bowl barely changes, consider the type and amount of food your cat eats.
How can I tell whether my cat drinks enough?
It is not always easy to measure exactly how much a cat drinks, especially if it has several water stations or goes outdoors. The most useful approach is to observe its habits over time.
- Keep fresh, clean water available at all times.
- If possible, provide several water stations in quiet, easy-to-access places.
- Clean bowls or the fountain regularly.
- Pay particular attention to sudden changes: a cat that abruptly starts drinking much more or much less deserves closer attention.
If your cat persistently refuses to drink, seems lethargic, eats less, has dry mucous membranes or you suspect dehydration, contact a veterinarian promptly. A marked change in thirst can also accompany health problems and should not be interpreted solely from a number found online.
You can also read our guide: Why isn’t my cat drinking? Causes, signs and solutions.
How can you encourage a cat to drink more?
Preferences vary considerably from one cat to another. Offering several options is often more effective than imposing a single way of drinking.
- Refresh the water regularly.
- Try several quiet locations.
- Provide several containers if you have more than one animal.
- Try a different bowl shape or material if your cat seems reluctant.
- Depending on its diet and your veterinarian’s advice, adding more wet food may help increase total water intake.
Can a water fountain help?
Yes, for some cats. The Cornell Feline Health Center notes that some cats increase their water intake when offered a fountain, while individual preferences vary. A fountain therefore does not guarantee that a cat will drink more, but it can provide an additional appealing water station.
A fountain also provides moving water and, depending on the model, filtration. Maintenance is essential to keep it pleasant to use: clean the reservoir and pump, rinse the relevant parts and replace filters according to recommendations.
To choose a suitable model, read our guide to choosing a cat water fountain or our comparison of stainless steel and plastic.
You can also browse THYLY water fountains.
Do you need to measure exactly how much water your cat drinks every day?
For a healthy cat, it is generally unnecessary to track every millilitre each day. However, knowing your cat’s usual habits can help you notice changes more easily.
If your veterinarian asks you to monitor water consumption precisely, start with a measured amount and record what remains after 24 hours, taking into account refills, spills and other animals using the same water station.
Key points
A common reference is around 50 ml of water per kg of body weight per day in total. That is about 200 ml for a 4 kg cat, but the water can come from both drinking and food. A cat eating wet food may therefore drink considerably less from a bowl than one fed mainly dry food.
Rather than focusing on a single number, monitor your cat’s habits, always provide clean water and offer several drinking options. If you notice a sudden change or worrying signs, seek veterinary advice.
Sources consulted: Cornell University College of Veterinary Medicine – Feline Health Center, “Hydration”; Royal Canin Academy, “Water requirements and drinking habits in cats”.