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.