2026 Cat Hydration Guide: How Much Water Cats Need Daily

2026 Cat Hydration Guide: How Much Water Cats Need Daily

Keeping your cat properly hydrated is simpler than it seems: most healthy adults need about 40–60 ml of water per kilogram of body weight each day, and that total includes what they drink plus the moisture in their food. For a 4 kg cat, that’s roughly 200–240 ml daily. Hydration supports kidney filtration, urinary comfort, digestion, and circulation, and small shifts in drinking can signal meaningful changes in health. Because feline thirst drives are often subtle and intake varies by diet, age, health, and environment, use the quick targets and step-by-step checks below to personalize a plan for your cat’s daily water needs using an at‑home “cat water calculator” approach informed by current guidance from PETKIT and International Cat Care, and by Pet Food Ingredient Guide’s moisture‑first perspective.