Cat Daily Calorie Calculator
Calculate the precise daily energy requirements for your feline companion.
How Cat Calorie Requirements are Calculated
Calculating the correct amount of food for your cat is essential for preventing obesity and ensuring they receive proper nutrition. Veterinarians typically use two main metrics: Resting Energy Requirement (RER) and Maintenance Energy Requirement (MER).
The RER represents the energy burned while the cat is at rest in a thermoneutral environment. The formula used in this calculator is the most scientifically accurate power function:
RER = 70 × (Body Weight in kg)^0.75
Understanding Maintenance Energy Requirement (MER)
Once the RER is established, we apply a multiplier based on the cat's specific life stage, metabolism, and activity level. This gives us the MER, which is the actual number of calories your cat should consume daily.
| Cat Status | Multiplier |
|---|---|
| Neutered Adult | 1.2 x RER |
| Intact Adult | 1.4 x RER |
| Active Kitten | 2.0 – 3.0 x RER |
| Weight Loss Target | 0.8 x RER |
Example Calculation
If you have an indoor, neutered adult cat weighing 5kg (approx. 11 lbs):
- Step 1: Calculate RER: 70 × (5)^0.75 ≈ 234 kcal.
- Step 2: Apply Multiplier: 234 kcal × 1.2 = 281 kcal per day.
Important Considerations
While this calculator provides a scientifically grounded starting point, every cat is an individual. Factors like breed, ambient temperature, and underlying health conditions can affect metabolic rate. Always monitor your cat's Body Condition Score (BCS). If you can feel the ribs easily but not see them, and your cat has a visible waistline from above, they are likely at a healthy weight.
Note: Treats should never exceed 10% of a cat's total daily calorie intake. If you give treats, remember to subtract those calories from their main meal portions.