How to Read a Dog Food Label (and Find Calories Per Cup)

Learn where to find calories per cup on a dog food bag, what the AAFCO statement means, and how to use the number to measure the right portion.

The back of a dog food bag is crowded with numbers and claims, but only a few of them matter when you are working out how much to feed. This guide shows where to find them and how to use them.

1. Find the calories per cup

Look for a section called Calorie Content or Metabolizable Energy (ME). In the United States, most dog foods list it as kilocalories per kilogram (kcal/kg) and kilocalories per cup (kcal/cup). It is usually printed near the guaranteed analysis or on the side panel. Dry foods commonly fall somewhere between 300 and 450 kcal per cup, but brands vary a lot, so check your own bag rather than guessing.

This is the number to type into the "Food calories" box in our dog food calculator. Two foods that look similar can differ by 100 calories per cup or more, which changes the right portion by a quarter of a cup or more per meal.

If the bag only gives kcal/kg, you can estimate kcal/cup for typical dry kibble by dividing by about 9, because a cup of kibble usually weighs roughly 110 grams. For example, 3,500 kcal/kg works out to roughly 390 kcal per cup. The manufacturer's website or customer service can give you the exact figure. For canned food, the label usually lists kcal per can.

2. Check for the "complete and balanced" statement

Look for a sentence mentioning AAFCO (the Association of American Feed Control Officials). It should say the food is formulated to meet the AAFCO Dog Food Nutrient Profiles, or has passed animal feeding tests, for a specific life stage:

• Growth (puppies, and pregnant or nursing dogs)
• Adult maintenance
• All life stages

Puppies of large breeds should eat a food that says it is suitable for the growth of large-size dogs. Foods labeled "for intermittent or supplemental feeding only" are not complete diets.

3. Understand the guaranteed analysis

The guaranteed analysis lists minimum percentages of crude protein and crude fat, and maximum percentages of crude fiber and moisture. Because wet food contains much more water than dry food, you cannot compare the percentages directly between the two types. To compare fairly, you need to convert to a "dry matter" basis, and your vet can help with that.

4. Read the ingredient list with care

Ingredients are listed by weight before cooking. Fresh meat contains a lot of water, so it can appear first even though a food using meat meal may contain more actual meat protein. The list is useful for spotting ingredients your dog is allergic to, but it does not tell you whether a food is better or worse overall. If you are thinking about a grain-free diet, talk to your vet first. The U.S. FDA has investigated a possible link between some grain-free diets and a heart condition in dogs.

5. Treat the bag's feeding chart as a starting point

The feeding chart on the bag is based on average dogs and often suggests generous amounts. Use it for comparison, but calculate the amount for your own dog, then adjust by watching their body condition. Our guide on how to tell if your dog is a healthy weight explains how.

A worked example

A neutered adult dog weighing 40 pounds needs roughly 985 calories a day. If the food is 380 kcal per cup, that is about 2.6 cups a day, or around 1.3 cups for each of two meals. If you swap to a food with 320 kcal per cup, the same dog needs about 3.1 cups. That is why measuring by calories, not by "a scoop," keeps portions right when you change brands.

These numbers are general estimates. Talk with your veterinarian before changing your dog's diet, especially for puppies, seniors, or dogs with health conditions.

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