Feline Energy Estimator
Daily Cat Calorie Estimator
Estimate your cat's daily Resting Energy Requirement (RER) and Daily Energy Requirement (DER) range based on veterinary formulas.
Cat Measurements
Weight Unit
Estimated Energy Needs
4.5 kg
259 – 281 kcal/day
Base Resting Requirement (RER): 216 kcal/day
Multiplier Formula Used:
Neutered adult cat maintenance (DER = 1.2–1.3 × RER)
Formula Assumptions:
- RER calculated using standard veterinary exponent formula: 70 × (4.5 kg)^0.75 = 216 kcal/day.
- Applies standard energy multipliers recommended by WSAVA Global Nutrition Committee guidelines.
- Individual metabolic rates can vary by up to 20%. Adjust portion sizes gradually based on body condition score.
Critical Veterinary Warning
This calculator is designed for healthy, adult cats. Kittens under 1 year, pregnant or lactating queens, cats with kidney disease, diabetes, or severe obesity require specialized veterinary dietary prescriptions and must NOT be put on unmonitored calorie restriction.