Cat Food Calculator

We compute your cat's Daily Energy Requirement (DER) from weight, life stage, and activity level using the standard veterinary RER × multiplier formula, then divide by the calories per cup or per can of your specific food.

Look for "kcal/cup" (dry food) or "kcal/can" (wet food) on the bag or can — usually listed under "calorie content." Typical dry food is 250–400 kcal/cup; wet food (a 3 oz can) is usually 70–100 kcal/can. Manufacturer websites and product pages also list this.

Yes — many cat owners do. Add up the calories you intend to feed from each (e.g., one 80-cal wet can + ¼ cup dry at 90 cal = 170 kcal) and compare to the daily target. Wet food contributes meaningful water intake, which is generally good for cats prone to urinary issues.

The kitten multiplier is conservative (2.0×) and works for most kittens older than 4 months. Very young kittens (under 4 months) need more frequent meals and higher calorie density — work with your vet. Senior cats often have lower needs but specific health conditions (kidney, thyroid, diabetes) change the picture significantly. Treat the calculator as a starting point, not a prescription.

An average 10-lb adult indoor cat needs about 240 calories per day. Larger cats need more (~300 calories at 12-13 lbs), smaller cats less (~180 calories at 7-8 lbs). Use the calculator above to get a precise number based on your cat's specific weight, age, and activity level.

Wet food has advantages: more moisture (cats have low thirst drives), higher protein, lower carbs, and helps prevent urinary issues. Dry food is more convenient, less expensive, and better for dental health (somewhat). Many vets recommend mixed feeding (wet + dry) for the best of both. Watch portion sizes carefully with dry food — it's calorie-dense.

Several possibilities: (1) overfeeding habits — they've learned begging works. (2) Low-quality food — high carb fillers don't satisfy. (3) Underfeeding — actual calorie shortage. (4) Medical issues — hyperthyroidism, diabetes, or intestinal parasites all cause increased appetite. If a normally satisfied cat suddenly becomes very hungry, see a vet to rule out medical causes.

Reduce daily calories by 10-15% at first, monitor weight weekly, adjust as needed. Switch to wet food or low-calorie dry food. Feed measured meals 2-3 times daily (not free-feeding). Increase activity with toys and playtime. NEVER restrict food sharply — cats can develop fatty liver disease from rapid weight loss. Target 1-2% body weight loss per week, no more.

Adult cats do best with 2-3 measured meals per day. Kittens need 3-4 meals. Senior cats may benefit from smaller, more frequent meals. Free-feeding (leaving food out 24/7) often leads to obesity and is harder to monitor. Scheduled feeding helps you notice appetite changes early.

A cat that won't eat for 24 hours needs immediate vet attention. Cats can develop hepatic lipidosis (fatty liver disease) within just 2-3 days of not eating — this is a medical emergency. Even partial appetite loss for more than 24-48 hours warrants a vet call. Cats are masters at hiding illness; reduced appetite is often the first sign.