How much should I feed my dog or cat?

Calories, not scoops

Every pet food has a different number of calories, so “one scoop” can mean very different amounts. This calculator works out how many calories your pet needs each day, then turns that into grams of your food. Check the calories per 100 g on the back of the bag, tin or pouch and type it in for the most accurate answer.

How the daily calories are worked out

Vets start with a pet’s resting energy need, worked out from their weight, then multiply it by a figure for their life stage and lifestyle. A growing puppy needs about three times its resting energy, a neutered adult dog about one and a half times, and a pet on a diet less. It’s the method used in veterinary nutrition guidelines.

Feeding wet and dry together

Many cats and dogs eat a mix. Choose “Both” and how much of the diet is wet, and the calculator splits the day’s calories between the two foods, so the total is right and your pet doesn’t get double portions.

Feed for the ideal weight

If your pet is carrying extra weight, feeding for their current weight keeps them there. Use the body shape check to estimate a healthy target, and ask your vet to confirm it. For steady weight loss, also choose “On a diet to lose weight”.

Treats count too

Treats, chews and table scraps should make up no more than about a tenth of the daily calories. If you give a lot of treats, cut the main meals down a little.

Check, then adjust

Weigh your pet every few weeks. If they’re gaining or losing weight you didn’t intend, change the amount by about 10% and check again.

Where the method comes from

The calorie sums use the resting energy formula and life-stage factors set out in the 2021 AAHA Nutrition and Weight Management Guidelines for dogs and cats.