Cat calorie calculator
Estimate how many calories your cat needs each day based on weight and life stage, using the same RER and MER formulas vets use.
Estimated daily calories
260
kcal per day
How the cat calorie calculator works
Every cat has a resting energy requirement, the calories it burns just to keep its body ticking over at rest. The formula is 70 times body weight in kilograms raised to the power of 0.75. We then multiply that by a life-stage factor to estimate the calories your cat needs across a full day.
Cat multipliers are lower than dog multipliers because cats are smaller and, especially indoors, far less active. Growing kittens are the big exception, burning roughly double the energy of an adult cat per pound. Pick the life stage that matches your cat now, since it makes the biggest difference to the result.
Weight control is one of the most important things you can do for a cat's long-term health. Wet food, measured portions, and regular weigh-ins all help. This is a starting estimate, so watch your cat's body condition over time and adjust with your vet's guidance. Want to know your cat's age in human years? Use our cat age calculator.
Frequently asked questions
How many calories does my cat need per day?
Most neutered adult indoor cats need their resting energy requirement multiplied by about 1.2, which often lands around 200 to 280 calories a day for a typical 4 to 5 kg cat. This tool works that out from your cat's weight and life stage.
How is the calorie estimate calculated?
We use the resting energy requirement formula, 70 times body weight in kilograms raised to the power of 0.75, then multiply by a life-stage factor to get the daily maintenance energy requirement. These are standard veterinary nutrition formulas, the same ones used for dogs with cat-specific multipliers.
Why do cats need fewer calories than dogs?
Cats are smaller and, especially indoors, tend to be less active, so their life-stage multipliers are lower than a dog's. Neutered indoor cats in particular gain weight easily, which is why portion control matters so much for them.
My cat is overweight. How do I help it lose weight safely?
Choose the 'needs to lose weight' option for a lower calorie target, then reduce intake gradually. Cats must never be crash-dieted, as rapid weight loss can cause a dangerous liver condition. Always plan feline weight loss with your veterinarian.
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Scan your first label freeThis calculator gives general guidance only, not veterinary advice. Always consult your veterinarian for medical decisions about your pet.