How many cups are in a can of dog food?

By Josh · Reviewed and updated: 2026-10-09

A 13 oz can of dog food holds about 1.5–1.6 cups by volume, and contains 350–492 kcal — the calorie range is taken from the labels of six popular 12.3–13.4 oz cans, so it is a measured range rather than a guess. A 5.5 oz can is about 0.6–0.7 cups and 189–194 kcal. The cup figure is a volume estimate, because cans are sold by weight and not by volume; the calorie figure is the one printed on the tin.

This page is about cans. If you are converting a bag or a pound of dry food, those are worked out separately — see cups in a pound of dog food and cups in a bag.

Cups per can, by can size

Cup volumes are estimates, not label figures: canned food is about 75–78% water, so its density is close to water’s and one ounce of can weight is roughly one fluid ounce. The calorie figures are metabolisable energy as printed on the labels of the products listed under Sources. Your can may sit outside both ranges — the label on the tin always wins.

Why there is no single number

Canned dog food is not one product. Across the six labels on this page the energy density runs from 0.95 to 1.33 kcal per gram — a spread of about 1.4× — which is why a 13 oz can can hold anywhere from 350 to 492 kcal. Two cans the same size, on the same shelf, can differ by 140 kcal.

That is more variation than dry food shows, and it has a practical consequence: switching brands of wet food at the same can size can change your dog’s intake by 40% without you changing anything you do. Check the kcal figure before you assume last month’s portion still applies.

The mistake that matters: a cup of canned food is not a cup of dry

This is the trap that catches people converting between formats, and it goes in the direction most owners do not expect.

A cup of canned food carries only about 55–78% of the calories of a cup of dry food. So if you replace dry with canned cup for cup, you cut your dog’s calories by roughly half.

The direction is the opposite of what most people assume: canned food is bulkier and looks like more food, so owners tend to feed less of it, not more. To match the energy in one cup of dry food you need 1.29–1.81 cups of canned. Mixing the two is fine — just do the arithmetic in calories, never in cups.

The manufacturers themselves frame it the same way. Purina’s feeding guide for a canned formula states plainly: “When feeding with dry product, 1 can replaces approximately 1 cup of dry Pro Plan formula.” That is an energy equivalence — one can’s worth of calories for one cup’s worth of dry — and it is not a statement about volume. One can is closer to 1.5 cups of volume, as the table above shows.

Is 8 oz the same as 1 cup?

Almost, for this particular food, and for a reason that is easy to mix up. “8 oz = 1 cup” is only exactly true for fluid ounces — 8 fl oz of water is one measuring cup. A can is labelled in weight ounces, which is a different unit.

It happens to work out to within about 13% here, because canned dog food is mostly water: 8 oz by weight is 227 g, and one cup of canned food weighs roughly 225–260 g. So the folk rule is close enough to be useful, and loose enough that you should not treat it as a definition. Weigh a filled measuring cup once and you will know your food’s figure.

What the label actually tells you

• Net weight in ounces — how much food is in the can. 5.5 oz, 12.3 oz, 13 oz and 13.4 oz are the common sizes for dogs.
• Calorie content, as kcal/kg and often kcal/can — the number that decides how much to feed. If only kcal/kg is printed, multiply by the net weight in kg.
• A moisture figure — normally 75–78% for canned food, against about 10% for dry. This is what makes the same volume weigh differently.
• An AAFCO statement — the only claim on the label with a legal definition behind it. See how to read a calorie label.

If you are deciding how much to feed rather than just converting units, the calculator turns a label figure into grams and cups for your dog’s weight, and how much wet food to feed a dog covers the wet-only case. Switching between formats is covered in wet and dry food conversion.

Common follow-up questions

How many cups is a 12 oz can? About 1.45 cups by volume, and roughly 430 kcal for the labels checked here. Can sizes are close enough that 12 oz, 12.3 oz and 12.5 oz all land within about a tenth of a cup of each other.

How many 5.5 oz cans equal a 13 oz can? By volume, about 2.4 — but by calories it depends entirely on the two products, so compare the label figures rather than the can counts.

Does a bigger can mean cheaper food? Per kilogram, usually yes. Per calorie, it depends on the energy density — a 13 oz can at 350 kcal is worse value than a 12.3 oz can at 432 kcal even if it costs the same. See cost per day and how long a can or bag keeps.

How many cups are in a pound of dry food? Different question, different answer: dry food works out at roughly 4 cups per pound at 110 g a cup, and cups in a pound of dog food has the table.

Which is better, canned or dry? Neither is better as a category — the calorie count and the body condition of the dog decide. wet vs dry dog food sets out where each has the advantage.

Sources

Calorie figures are metabolisable energy (ME) as printed on the following product labels, read 2026-10-09. Cup volumes are calculated from net weight at a density of 1.0 g/mL, which follows from the 75–78% moisture printed on the same labels; they are estimates and are labelled as such above.

• Purina Pro Plan Beef & Rice Chunks in Gravy (Large Breed), 13 oz — ME 350 kcal/can; moisture max 78%.
• Purina Pro Plan Natural Adult Grain Free Chicken & Carrots, 13 oz — ME 1,333 kcal/kg, 492 kcal/can.
• Purina Pro Plan Complete Essentials Beef & Rice Entrée, 13 oz (368 g) — ME 1,157 kcal/kg, 426 kcal/can.
• Purina Pro Plan Sport High Protein Beef & Bison Entrée, 13 oz — ME 1,208 kcal/kg, 445 kcal/can. (Purina.com)
• Purina Pro Plan Veterinary Diets EN Gastroenteric, 13.4 oz — ME 1,088 kcal/kg, 413 kcal/can; moisture max 75%.
• NutriSource Turkey & Rice Wet Dog Food, 12.3 oz — ME 1,235 kcal/kg, 432 kcal/can; moisture 73.9%. (NutriSource.com)
• NutriSource Small & Medium Breed Puppy, 5.5 oz — ME 1,241 kcal/kg, 194 kcal/can.
• NutriSource Chicken & Rice Small & Medium Breed, 5.5 oz — ME 1,210 kcal/kg, 189 kcal/can; moisture 75.0%.

Net weight to volume conversion: 1 oz = 28.3495 g, 1 US cup = 236.588 mL, density taken as 1.0 g/mL. Dry-food comparison uses this site’s standard figures of 3,700 kcal/kg and 110 g per cup. This page is general information, not veterinary advice.

Cups in a pound of dog food →  ·  Cups in a bag →  ·  Quarts in a pound →  ·  Calories per cup →  ·  How much wet food →  ·  All feeding guides →