A neutered adult dog eating only wet food needs about 1 standard 13 oz can per 15 to 20 lb of body weight a day, but the exact number depends on the calories in your can. A 30 lb dog needs about 745 kcal; at 450 kcal per can that is roughly 1.7 cans a day. Below are portions by weight and how to adjust them for your label.
Wet food portions by weight
Calculated for a neutered adult with the veterinary formula (70 x kg to the 0.75 power, times 1.5), with a typical wet food of 95 kcal per 100 g and 450 kcal per 13 oz can.
| Dog weight | Calories per day | Grams of wet food | 13 oz cans |
|---|---|---|---|
| 10 lb | 326 kcal | about 345 g | about 0.7 |
| 20 lb | 549 kcal | about 580 g | about 1.2 |
| 30 lb | 744 kcal | about 785 g | about 1.7 |
| 50 lb | 1,091 kcal | about 1,150 g | about 2.4 |
| 70 lb | 1,404 kcal | about 1,480 g | about 3.1 |
Intact or very active dogs need 20 to 35% more; quiet seniors about 13% less. The dog calorie chart has every life stage, and the dog food calculator gives the exact number for your dog.
Read the can, not the bag chart
Wet foods vary far more than kibble. Across common US brands, a 13 oz can runs from about 350 to over 500 kcal, and small 3.5 oz trays from about 80 to 130 kcal. Two cans that look identical can feed your dog for very different amounts of the day.
Find the calorie statement on the label, usually written as kcal/kg and kcal per can. Divide your dog's daily calories by the kcal per can. If the label only shows kcal/kg, multiply by the can's net weight in kg: a 369 g (13 oz) can at 1,200 kcal/kg holds about 443 kcal.
Why wet portions look so large
Wet dog food is about 75 to 80% water, so it carries roughly a quarter of the calories of kibble per gram. A dog that eats 2 cups of kibble may need a very full bowl of wet food for the same energy. That is normal: it is the water, not overfeeding. The upside is extra hydration, which helps dogs that drink little. Our dog water calculator shows how much water a dog needs in total.
Mixing wet food with kibble
Most owners use wet food as a topper or one of two meals. The rule is the same as for cats: split the calories. For the 30 lb dog (744 kcal):
- Topper, about 25% wet: a third of a 13 oz can (about 150 kcal) plus kibble for the remaining 595 kcal, about 1.6 cups of a 375 kcal/cup food.
- Half and half: about 0.8 of a can (372 kcal) plus about 1 cup of the same kibble.
Adding wet food on top of an unchanged kibble portion is the most common cause of slow weight gain in mixed feeding.
Practical tips
- Serve wet food in two meals and pick up leftovers after about 30 minutes.
- Cover and refrigerate opened cans; use within about three days.
- Switching from all kibble to wet? Change over 7 to 10 days to avoid an upset stomach. See the puppy feeding schedule for the same gradual method in young dogs.
- Weigh your dog every two weeks for the first month and adjust by about 10%.
Wet food also counts toward your dog's fluids; see how much water a dog should drink. It costs more per calorie than kibble, which shows up in the monthly cost of a dog.
FAQ
How many cans of wet food should a 20 lb dog eat?
About 1.2 cans of a 450 kcal, 13 oz can per day if neutered, if wet food is the only food.
Is wet food better for dogs than dry?
Both can be complete and balanced; look for the AAFCO statement on the label. Wet food adds water and appeal for picky eaters; dry food costs less per calorie and is easier to store.
Can I feed wet food to a puppy?
Yes, if it is labeled for growth or all life stages. Puppies need more calories per pound, so use the puppy feeding calculator rather than the adult table above.