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Pets, Digital & Site Tool
Pet Calorie Calculator
Estimate daily calories for dogs and cats from weight, life stage, activity level and meals per day using RER and MER formulas.
Dog and cat calorie estimator
Optional, from the food label.
Daily calories–
Per meal–
RER–
Cups per day–
Enter pet details to estimate daily calories.
Pet calorie formulas
RER = 70 x body weight in kg ^ 0.75
MER = RER x life stage or activity multiplier
RER means resting energy requirement. MER means maintenance energy requirement. The multiplier changes with pet type, age, activity, neuter status and weight goal.
Important pet nutrition note
This calculator is an educational estimate, not veterinary advice. Calories can change with breed, body condition, illness, medication, pregnancy, nursing and weight goals. Ask a veterinarian before making major diet changes, especially for puppies, kittens, seniors or pets with medical conditions.
Pet Calorie Calculator FAQ
How many calories does my dog need?
Start with RER from body weight, then multiply by a dog activity or life-stage factor. The calculator does this estimate automatically.
How many calories does my cat need?
Cats usually use lower adult multipliers than dogs. The calculator adjusts common multipliers by pet type.
What is RER?
RER is resting energy requirement, estimated as 70 times body weight in kilograms raised to the 0.75 power.
Can this help with weight loss?
It can estimate a starting point, but weight-loss plans should be supervised by a veterinarian.
How do I use calories per cup?
Enter kcal per cup from the pet food label to estimate cups per day and cups per meal.
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