PetlyInfo

It depends on weight, age, neuter status, activity level, body condition, and goal. PetlyInfo uses the veterinary standard formula: RER = 70 × (weight in kg)^0.75, then applies the right multipliers.

Kittens grow rapidly and have higher metabolic rates. Under 4 months they typically need 2.5× RER, while 4–12 month kittens need about 2.0×.

For weight loss or gain, always use the ideal weight. PetlyInfo automatically uses the estimated ideal weight for those goals to make calculations safer and more accurate.

Yes, neutered or spayed cats generally need 20–30% fewer calories. PetlyInfo automatically adjusts for this.

It follows widely accepted veterinary nutrition formulas. However, every cat is unique. Use it as a helpful guide and consult your veterinarian for personalized advice, especially if your cat has health conditions.

Every 3–6 months, or whenever your cat’s weight, age category, activity level, or goal changes significantly.

Yes! Select “Weight gain”. PetlyInfo will use the ideal weight estimator and apply a higher multiplier to help your cat reach a healthy weight safely.

This calculator is for generally healthy cats. If your cat has diabetes, kidney disease, hyperthyroidism, or other conditions, always consult your veterinarian before changing their diet.