Cats • nutritionVerified Scientific Formula
Cat Calorie Calculator
Computes resting energy (RER) and daily maintenance energy (MER) for cats and kittens based on weight, neuter status, and activity.
Enter Parameters
Calculated Output
Estimated Daily Energy Requirement
261kcal/day218 kcal/day (RER)
Estimated Expected Range: 235 – 287 kcal/day
What This Result Means
A cat weighing 10 lbs with this profile requires approximately 261 kcal/day.
Calculation Details & Practical Equivalents
Resting Energy Requirement (RER)
218 kcal/day
Life Stage Multiplier
1.2×
Equivalent 3 oz Wet Cans (~80 kcal/can)
~3.3 cans/day
Equivalent Dry Kibble (~380 kcal/cup)
~0.69 cups/day
Formula & Mathematical Methodology
Standard Mathematical Formula
RER = 70 × (Body Weight in kg)^0.75 | MER = RER × Feline Factor
Formula Variables Defined
BWCat Body Weight(kg or lbs)
Current body mass
RERResting Energy Requirement(kcal/day)
Basal calories required at rest
Step-by-Step Calculation Example
Example: 10 lb (4.5 kg) Indoor Neutered Cat
A 10 lb domestic shorthair adult indoor cat.
- Convert to kg: 10 lbs ÷ 2.20462 = 4.54 kg
- Calculate RER: 70 × (4.54)^0.75 = 217 kcal/day
- Recommended daily energy: ~215 kcal/day
Final Output: 217 kcal/day (Range: 195 – 239 kcal/day)
Key Assumptions
- The cat is consuming a complete and balanced feline diet.
Biological Limitations
- Neutered indoor cats have lower baseline metabolic rates.
Verified Scientific & Veterinary Sources
Version: 1.0•Methodology Reviewed: 2026-01-15
1. Nutrient Requirements of Dogs and Catstextbook
National Research Council (NRC) Committee on Animal Nutrition (2006). National Academies Press, Washington, D.C.
Access Source Authority 2. WSAVA Global Nutrition Guidelines & Calorie Calculator Referenceguideline
World Small Animal Veterinary Association (WSAVA) Global Nutrition Committee (2021). Journal of Small Animal Practice
Access Source Authority Cat Calorie Calculator — FAQs
A typical 3 oz (85g) can contains 70 to 90 kcal. A cat requiring 215 kcal/day needs approximately 2.5 to 3 small cans per day.
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