How Much Water Should My Pet Drink?
Calculate your dog or cat's daily water intake needs based on weight, activity, weather, and diet type.
Daily Water Target
550
ml / day
In fl. oz
18.6
fl oz / day
Approx cups
2.3
240 ml cups
💡 Practical tip
Always have fresh water available. Instead of measuring exactly, watch that your pet drains their bowl 2 timesper day. If they're drinking significantly more or less, mention it to your vet.
Signs of Dehydration
- •Dry or tacky gums
- •Skin tent (skin doesn't snap back)
- •Sunken eyes
- •Lethargy or weakness
- •Dark-coloured urine
Based on standard veterinary guidelines (50–60 ml/kg/day baseline). Illness, medications, nursing, and kidney conditions significantly affect needs — always consult your vet for medical cases.
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Get the Full ExperienceNormal daily water intake for dogs and cats is 20–70 ml per kg of body weight, according to veterinary internal medicine guidelines. The precise requirement varies by diet type (wet food contributes 60–80% of moisture needs; dry kibble almost none), ambient temperature, exercise level, and health status. Polydipsia — excessive thirst defined as drinking more than 90–100 ml/kg/day — is a clinically significant symptom associated with diabetes mellitus, Cushing's disease, kidney disease, and pyometra. This calculator gives you a personalised daily water target so you can establish a baseline and recognise deviations early.
Frequently Asked Questions
How much water should a dog drink per day?
A healthy adult dog should drink approximately 20–70 ml per kg of body weight per day. For a 20 kg Labrador Retriever, that is 400–1,400 ml (roughly 1.5–6 cups). Dogs on wet food need significantly less from their bowl — wet food is 60–80% water. A dog who has just exercised vigorously will drink more immediately after. Consistent measurement over 3 days gives a reliable individual baseline.
How much water should a cat drink per day?
Healthy cats need approximately 40–60 ml per kg of body weight per day. A 4 kg cat needs about 160–240 ml daily. However, most of this should come from food — cats evolved as desert animals and naturally have a low thirst drive. A cat eating wet food may drink almost nothing from a bowl; a cat on dry kibble needs to drink substantially more. Low water intake in cats on dry food is a risk factor for lower urinary tract disease (FLUTD) and kidney disease.
Why is my dog drinking more water than usual?
Increased water consumption (polydipsia) in dogs is associated with several conditions: diabetes mellitus (polyuria/polydipsia is a hallmark symptom), Cushing's disease (hyperadrenocorticism), chronic kidney disease, pyometra in intact females, hypercalcaemia, and liver disease. Medications such as corticosteroids and phenobarbitone also increase thirst as a known side effect. If your dog is consistently drinking more than 90–100 ml/kg/day without an obvious benign cause (heat, exercise, diet change), a veterinary blood and urine panel is warranted.
Does diet affect how much water my pet needs?
Yes — significantly. Wet food is 70–80% water and substantially reduces how much a dog or cat needs to drink from a bowl. Dry kibble is only 8–12% water, so dogs and cats on dry diets need to drink much more. If you recently switched from wet to dry food and notice your pet drinking more, this is the expected and appropriate response — not a health concern.
How can I encourage my cat to drink more water?
Cats are attracted to moving water — a pet water fountain increases consumption in most cats compared to a static bowl. Multiple water stations around the home also help. Feeding wet or raw food, adding water to dry food, or offering a small amount of low-sodium broth are evidence-supported strategies. Stainless steel or ceramic bowls are preferable to plastic, which can harbour bacteria that some cats find aversive.