💧 Pet Water Intake Calculator
Enter your pet's weight to see a normal daily water range. Water from wet food counts toward the total.
How the Pet Water Intake Calculator works
A common guideline is about 50–65 mL per kg (roughly 0.8–1 fluid ounce per pound) a day for dogs, and about 45–60 mL per kg for cats. Heat, exercise and dry food increase needs.
Step-by-step calculation
- 1Choose dog or cat and enter weight.
- 2Multiply kg by the mL range.
- 3Convert to ounces and cups.
Worked example
A 30 lb (13.6 kg) dog needs roughly 680–885 mL a day — about 23–30 fluid ounces, or roughly 2.9–3.7 cups.
Pet Water Intake Calculator examples
| Weight | Daily water |
|---|---|
| 15 | 340–442 mL / day |
| 23 | 522–678 mL / day |
| 30 | 680–885 mL / day |
| 38 | 862–1,120 mL / day |
| 45 | 1,021–1,327 mL / day |
Other inputs kept at the calculator's default values. Results calculated by this calculator.
Why use a Pet Water Intake Calculator?
Check your pet is drinking enough.
Important factors that can affect your results
- Wet food adds water.
- Heat and exercise.
- Sudden thirst changes need a vet.
Frequently asked questions
When is drinking too much a concern?
A sudden big increase in thirst can signal health problems such as diabetes or kidney disease — see a vet.
My cat barely drinks. Is that okay?
Cats on wet food drink less from the bowl. Water fountains can encourage drinking.
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Last reviewed November 2026 · How we build and check our tools · Report a problem