Is this a substitute for a veterinarian?

No. PortPaw is a general estimate. Puppies, seniors, pregnant dogs, and dogs on a weight-loss plan should have a feeding plan confirmed by a vet.

Free estimate · US cups & pounds

Dog Food Calculator

See a daily calorie target and how many cups or cans that means. Built for people comparing foods, not for guessing from a generic chart.

Guides for a specific dog

Puppy feedingHigher calorie needs while they are still growing. Senior dogsSlightly lower targets for less active older dogs. Weight lossA conservative calorie cut, not a crash diet. Wet food cansConvert the same calorie target into cans. Feeding chartQuick adult portions by weight, then refine here.

How the estimate works

The calculator starts with resting energy: 70 × (weight in kilograms)^0.75. It then multiplies for life stage — about 2.5× for puppies, 1.6× for typical adults, 1.4× for seniors, and 1× when the goal is weight loss. Activity nudges the adult and puppy numbers up or down.

Cups are not a standard unit. A cup of one kibble can be 300 kcal and another 450 kcal. Paste the kcal per cup or per can from your bag so the portion matches the food you actually buy.

FAQ

How much should I feed my dog?

Use body weight, life stage, and the calorie density on the label. The number on this page is a starting portion, not a prescription.

Should I follow the bag chart instead?

Bag charts are written for that recipe. If your dog is gaining or losing weight on the bag amount, adjust slowly and ask your vet.

How many meals a day?

Most adult dogs do well on two meals. Puppies usually need three smaller meals.