Calculate RER & MER Veterinary Food Portions
Use our interactive veterinary calculator to determine exact Resting Energy Requirements (RER = 70 × Weight in kg0.75) and Maintenance Energy Requirements (MER) for puppies, adult dogs, kittens, and senior cats following World Small Animal Veterinary Association (WSAVA) Global Nutrition Guidelines.
Volumetric scoop cups vary by up to 25% per meal. Converting daily kilocalories (kcal/day) into exact gram weights using your kibble or wet food caloric density (kcal/kg) prevents accidental overfeeding, canine obesity, and feline diabetes.
WSAVA Daily Energy Multiplier Reference
- Neutered Adult Dog: 1.6 × RER (standard indoor/moderate exercise maintenance)
- Intact Adult Dog: 1.8 × RER
- Weight Loss Dog: 1.0 × RER (for ideal target weight under veterinary supervision)
- Growing Puppy (0–4 Months): 3.0 × RER (split across 3–4 daily meals)
- Growing Puppy (4–12 Months): 2.0 × RER
- Neutered Indoor Cat: 1.2 × RER
- Active Adult Cat: 1.4 × RER
- Growing Kitten: 2.5 × RER