Hydration Guide · Cats
How much water does your cat need each day?
Calculate based on weight, diet, activity level, weather, and life stage — following the standard veterinary guideline of 50–60 mL per kg, including moisture from food.
Wet food is 70–80% moisture, so cats eating mostly wet food get much of their water from meals and drink less from the bowl.
Estimated Daily Water Need
500–700
mL / day
≈ 0.5–0.7 liters total
Estimated from the bowl: —
Basis of Calculation
Base range (all sources)50–60 mL / kg
Applied adjustment×1.00
⚠️ Water needs can change significantly during illness or medication. This calculator isn't reliable for those cases — please consult your veterinarian directly.
Note: This calculator is a general guideline only, not medical advice. The total reflects water from all sources, including food moisture. If your cat suddenly drinks far more or less than usual, urinates frequently, or seems lethargic — contact your veterinarian without delay.