Pet Water Intake Calculator
How much water your dog or cat should drink.
Instant results✓ Source-backed
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How this is calculated
Maintenance water need is about 50–60 ml/kg/day (roughly equal to calories needed in kcal). Clinical definition of excessive thirst (polydipsia) is >100 ml/kg/day. Wet food supplies much of a cat’s water, so cats on canned diets drink less from the bowl.
Source-based educational tool; not independently reviewed by a veterinarian. Cited guidance does not imply endorsement by its authors.
Formula
Daily water = 50–60 ml × weight kg Excessive (polydipsia) > 100 ml × weight kg
Assumptions
- •Includes water from food
- •Normal temperature and activity
- •Higher needs in heat, lactation or exercise