Dog & Cat Food Calorie Calculator

The tools on this page will enable you to do three things: estimate your cat or dog's calorie requirements based on their activity level and weight, calculate the calorie content of a given food, and - using these two pieces of information - establish an ideal portion size. Every animal is different and advice from your vet is essential in maintaining good health, but this page is a good place to start!

1. Your pet's energy requirements

Adult dog or adult cat?

How much do they weigh?

What is their Body Condition Score?

5: Normal

If your dog is very overweight with a body condition score of 7 or above, speak to your vet about an appropriate weight loss program.

How active are they?

Tip: Most owners overestimate their dog's activity level, leading to weight gain. For most dogs, the lowest option is most appropriate.

Daily Energy Requirements 0 calories First, enter activity level and weight. Calories required per day from food.

2. Energy content of your pet's main food

What is their food's nutritional composition?

Tip: Look for the 'Guaranteed Analysis' or 'Analytical Constituents' on the packaging.


Your percentages should not add up to more than 100! Please check your nutritional info again.

How do you weigh your dog's food?

Food Calorie Content 0 calories per gram

3. Total daily serving

How many times per day do you feed your dog?

Do you feed your dog treats?

Tip: Be honest! All supplemental food counts - dental sticks, treats, scraps off the table. It's important that at least 90% of your dog's calories come from their nutritionally complete main food.

Total Daily Serving 1 meals of 0 grams each Plus a maximum of calories of treats per day Total daily serving, with no treats

Why is a correct portion size so important?

Feeding your pet the right amount is just as important as feeding them the right food. Studies have shown that feeding dogs to an ideal body condition can add years to their life, not to mention do wonders for their general wellbeing and resilience to illness.

How does this calculator work?

Firstly, remember that the figures provided above are only a starting point, and you should always consult your vet if you have concerns about your pet's health.

Our calculator uses the Predictive Equations of NRC 2006 (also known as the 4-step method) to estimate the Metabolisable Energy of foods for cats and dogs, and formulas from FEDIAF (the European Pet Food Industry Federation) for estimating the Daily Energy Requirements (DER) of adult cats and dogs. These guidelines are available in the October 2021 edition of the FEDIAF Nutritional Guidelines. Note that these recommendations are intended for adults (not kittens or puppies) that are not pregnant or lactating.

The FEDIAF guidelines are - in our experience - the best way to predict the calorie content of a given food, and to estimate the energy requirements of adult cats and dogs. However, it's important to remember that any information which is provided by the manufacturer will be the most accurate, and that guidance from your vet should always be sought if you're in doubt about your pet's health.

If you're looking for a more detailed nutritional breakdown of your pet's food, or want to make like-for-like comparisons between wet and dry foods, be sure to check out our dry matter basis calculator.