Cat Water Intake Calculator

Cats need approximately 60 ml of water per kg of body weight daily (combined from food and drinking). Cats evolved in deserts and have a naturally low thirst drive, making chronic dehydration common. Our calculator determines how much your cat should drink based on diet, weight, and health status.

Water Content in Cat Food

• Dry food: 10% water (cats must drink significantly more)
• Wet food: 75% water (provides most hydration needs)
• Raw food: 70% water (similar to prey)

A 10 lb cat eating only dry food must drink ~200-250 ml water daily. The same cat on wet food only needs ~60-80 ml drinking water since food provides the rest.

Signs of Dehydration

• Skin tent test: Pinch skin on back of neck - should snap back instantly. Slow return = dehydrated
• Dry, sticky gums: Normal gums are moist and slippery
• Sunken eyes: Eyes appear recessed into head
• Lethargy: Unusual tiredness or weakness
• Concentrated urine: Dark yellow, strong odor
• Constipation: Hard, dry stools

Tips to Increase Water Intake

1. Cat water fountain: Running water increases intake by 40%
2. Multiple water bowls: Place in various locations
3. Wide, shallow bowls: Prevents whisker fatigue
4. Switch to wet food: Most effective hydration method
5. Add water to food: Mix into wet food or add to dry kibble
6. Ice cubes: Some cats enjoy playing with ice
7. Flavor water: Tiny amount of tuna juice (no salt added)

Health Conditions Affecting Water Needs

• Kidney disease: Need 50% more water than healthy cats
• Diabetes: Increased thirst and urination (polyuria/polydipsia)
• Hyperthyroidism: Increased water consumption
• Vomiting/diarrhea: Rapid dehydration - may need subcutaneous fluids from vet