A feeding chart and an energy label answer different questions. The chart suggests a portion; the energy label tells you how much energy a quantity contains. Start with the label before comparing foods or entering a feeding estimate.
First, find the unit
Look for “calorie content,” “metabolizable energy” or “kcal.” A value in kcal/kg describes a kilogram of food, not a bowl. Divide it by 10 for kcal/100 g, or by 1,000 for kcal/g. For example, 3,800 kcal/kg becomes 380 kcal/100 g and 3.8 kcal/g. These numbers describe the same food.
Work through one portion
Suppose a care plan allows 240 kcal a day and 20 kcal is allocated to treats. That leaves 220 kcal for the main food. At 380 kcal/100 g, the arithmetic is 220 ÷ 380 × 100 = 57.9 g per day. If you divide that into two meals, each is about 28.9 g. The 240 kcal figure is an example, not a recommendation for your cat.
What if the label says “per can”?
A can containing 85 kcal and 85 g has 100 kcal/100 g: 85 ÷ 85 × 100. For a mixed diet, add the energy from each food separately. Fifty grams of the example dry food provides 190 kcal; 40 g of the example wet food adds 40 kcal. The combined amount is 230 kcal before treats. Equal weights of different foods do not imply equal calories.
Keep the useful details
Keep a photo of the exact product label, including the variety and pack size, so you can check the values again. Enter the energy for the food actually in the bowl. If the package gives only a cup measurement, look for grams per cup or ask the manufacturer rather than guessing a volume-to-weight conversion.
Calories alone do not establish whether a food is nutritionally suitable. Your cat’s life stage, health and body condition still matter. Our feeding tool is limited to a starting estimate for healthy adults; it does not design a clinical diet.
AAHA recommends counting treats in daily intake and measuring food carefully. Source: AAHA nutrition guidance (PDF).
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