Most adult cats (around 1 year and older) need roughly 24–35 calories per pound (about 200–300 calories total per day for an average 8–10 lb cat), and standard wet food provides about 25–35 calories per ounce, though this varies by brand and formula. In practical terms, this typically works out to about two 3-ounce cans, or one 5.5-ounce can, split into two meals per day for an average-sized indoor cat — but always check the actual calorie content on your specific product's label, since recipes vary quite a bit (some are calorie-dense, others more diluted with broth or gravy).
Key factors that change the amount:
- Body weight and condition: Lighter or leaner cats need less; overweight cats being managed toward a target weight need a vet-calculated amount, not the package guideline.
- Activity level: Very active or outdoor cats burn more and may need more food.
- Wet-only vs. mixed feeding: If wet food is the sole diet, use the full daily amount from the calorie math above. If you're also feeding dry kibble, treats, or supplements, reduce the wet food portion proportionally so total daily calories stay balanced.
- Spay/neuter status: Spayed/neutered cats generally have slightly lower calorie needs than intact cats.
- Life stage nuances: A cat right at 1 year may still be finishing growth, so slightly more food than a mature 3–5 year old adult can be appropriate.
The most reliable approach is to start with the feeding guide printed on your specific wet food can or pouch (these are calculated for that product's exact calorie density), split the daily total into 2–3 meals, and then adjust up or down over a few weeks based on your cat's body condition — you should be able to feel (but not see prominently) the ribs, and there should be a visible waist when viewed from above. If you're unsure, a veterinarian or vet tech can calculate a precise calorie target based on your cat's current weight, body condition score, and activity level, and help you set portions accordingly.