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Pet Calorie Needs Calculator

Calculate how many calories your pet needs daily based on animal type, weight and activity level

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๐Ÿ‡ฉ๐Ÿ‡ฐ All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Calorie needs for pets

Our calorie calculator helps you determine how many calories your pet needs daily. The calculation uses the recognized RER formula (Resting Energy Requirement) and adjusts the result based on animal type and activity level.

Dog โ€“ daily calorie needs

Dog calorie needs are calculated using the RER formula: 70 x weight^0.75. This base value is multiplied by an activity factor: 1.4 for low activity, 1.6 for normal and 1.8 for high activity level. A 20 kg dog with normal activity level needs about 1,050 kcal daily. Large breeds need more calories than small breeds, but per kilo of body weight it's the opposite.

Cat โ€“ daily calorie needs

Cats use the same RER formula but with lower activity factors: 1.2 for low activity, 1.4 for normal and 1.6 for high activity. A 5 kg cat with normal activity level needs about 330 kcal daily. Indoor cats are typically less active and need fewer calories.

Rabbit โ€“ daily calorie needs

Rabbits need about 50 kcal per kg of body weight daily at normal activity. A 2 kg rabbit should get about 100 kcal daily. Rabbits get most of their energy from hay and fresh vegetables.

Hamster โ€“ daily calorie needs

Hamsters are small animals with a daily calorie need of about 12 kcal at normal activity. Although this seems low, it is relatively high compared to their body weight due to their fast metabolism.

Why are calories important?

Too many calories lead to obesity, which can cause joint problems, diabetes and reduced lifespan. Too few calories lead to underweight, muscle loss and weakened immune system. The right amount of calories is crucial for your pet's health.

Frequently Asked Questions

What is the RER formula?

RER stands for Resting Energy Requirement. The formula is 70 x weight^0.75, where weight is in kilograms. RER indicates the basic energy requirement for an animal at rest. To find the actual daily need, RER is multiplied by an activity factor that depends on the animal type and activity level.

How do I know if my pet is getting enough calories?

The best signs of correct calorie intake are: stable weight, ribs that can be felt but not clearly seen (in dogs and cats), good energy level and shiny coat. If your pet is gaining weight, it's getting too many calories. If losing weight, too few. Regular weighing at the vet is recommended.

Does calorie need change with age?

Yes, calorie needs change significantly with age. Puppies and kittens need up to twice as many calories as adult animals because they are growing. Older animals typically have lower activity levels and slower metabolism, so they need 20-30% fewer calories. Pregnant and nursing animals also have increased calorie needs.

Can I use the calculation for puppies?

This calculator is designed for adult animals. Puppies, kittens and other young animals have significantly higher calorie needs due to growth. A puppy typically needs 2-3 times as many calories as an adult dog of the same weight. Contact your vet for precise guidance on feeding young animals.

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