Calculadora de Calorias para Cães
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
RER = 70 × kg^0,75; MER = RER × fator_vida
About this calculator
The Dog Calorie Calculator estimates your dog's daily energy needs based on weight and activity level. It first calculates the Resting Energy Rate (RER), the energy required for basic vital functions, using the formula RER = 70 × weight(kg)^0.75. Then it multiplies this value by a life stage factor that varies according to the animal's condition: puppy, adult neutered or intact, senior, pregnant, lactating, or needing weight loss. The result is the Maintenance Energy Requirement (MER) in calories per day.
Use this calculator to adjust your dog's feeding accurately, avoiding overweight or malnutrition. For instance, an adult neutered dog has a factor of 1.6, while a growing puppy may reach 3.0. The tool is useful for owners preparing homemade food, for veterinarians in consultations, or for monitoring the diet of dogs with special conditions such as obesity or pregnancy. Remember the calculator provides an initial estimate; adjustments may be needed based on the individual animal's response.
Important cautions: the formula is based on healthy dogs and may not be suitable for animals with metabolic diseases (like hypothyroidism) or those on medications affecting metabolism. Always consult a veterinarian before changing your dog's diet, especially for puppies, seniors, or dogs with health issues. The calculator does not replace professional evaluation but is a practical everyday tool.
Frequently asked questions
How do I know the correct life stage factor for my dog?
The factor depends on age, reproductive status, and activity level. For example: puppies (up to 4 months) use factor 3.0; neutered adults 1.6; pregnant dogs 1.8; lactating dogs 4.0. Check the table in the calculator to choose the appropriate factor.
Does the calculator work for overweight dogs?
Yes, there is a specific factor for weight loss (1.0). It calculates the MER to maintain current weight while promoting controlled weight loss. Always consult a veterinarian before starting a calorie-restricted diet.
Can I use this calculator for giant breed puppies?
Yes, but note that large breed puppies have specific needs to avoid orthopedic issues. The puppy factor is generic; adjust feeding as directed by your veterinarian.
What if my dog doesn't eat the calculated amount?
The calculator provides an initial estimate. Monitor your dog's weight and body condition every two weeks. If unwanted weight loss or gain occurs, adjust the amount by 10% and reassess. Consult a vet if in doubt.
Is the formula the same for all breeds?
Yes, the RER formula is universal for dogs, but the life stage factor may vary. Breeds with faster metabolisms (like Border Collies) may need adjustments, while breeds prone to obesity (like Labradors) require careful monitoring.