🐈 Cat Water Intake Calculator

Cats evolved from desert-dwelling ancestors and naturally have a low thirst drive. In the wild, cats get most of their water from prey (which is ~70% water). A cat eating dry kibble (only ~10% moisture) may not drink enough to compensate, putting them at risk for chronic dehydration and kidney disease — the leading cause of death in older cats. This is why many veterinarians recommend incorporating wet food into a cat's diet. If your cat drinks very little, try a pet water fountain (cats prefer moving water), place multiple water bowls around the house, and keep water separate from their food bowl.

The easiest at-home test is the skin tent test: gently pinch the skin between your cat's shoulder blades, pull it up slightly, and release. In a well-hydrated cat, the skin should snap back immediately. If it stays tented or returns slowly, your cat may be dehydrated. Other signs include: dry or sticky gums, sunken eyes, lethargy, decreased appetite, and constipation. If your cat shows multiple signs, offer fresh water and wet food. If symptoms don't improve within a few hours, see your vet — dehydration can lead to serious complications in cats.

Excessive drinking (polydipsia) — defined as more than 100ml per kg of body weight per day — can be a sign of underlying health conditions in cats, including: chronic kidney disease, diabetes mellitus, hyperthyroidism, or a urinary tract infection. If your cat suddenly starts drinking significantly more water than usual (more than the amount our calculator shows for their diet type), make an appointment with your veterinarian for blood work and a urinalysis. Early detection of these conditions dramatically improves treatment outcomes.