Cat Calorie Calculator
Calculate exactly how many calories your cat needs daily. Prevent obesity with our RER-based tool for kittens, adults, and senior cats.
Daily Calorie Needs Calculator
How the Cat Calorie Calculator Works
This calculator uses the scientifically validated Resting Energy Requirement (RER) and Maintenance Energy Requirement (MER) formulas used by veterinarians worldwide.
Step 1: Calculate RER
The Resting Energy Requirement is the calories needed at rest:
RER = 70 × (Weight in kg)0.75
Step 2: Apply Life Stage Multiplier
Different life stages require different energy levels:
- Neutered Adult: 1.2 × RER
- Intact Adult: 1.4 × RER
- Active/Working Cat: 1.6 × RER
- Kitten (0-4 months): 3.0 × RER
- Kitten (4mo-1yr): 2.0 × RER
- Weight Loss: 0.8 × RER (of ideal weight)
- Senior Cat: 1.0 × RER
Step 3: Calculate MER
The Maintenance Energy Requirement is your cat's total daily calorie needs:
MER = RER × Life Stage Multiplier
Why Calorie Control Matters for Cats
Over 60% of domestic cats are overweight or obese, leading to serious health issues:
- Diabetes: Overweight cats are 4 times more likely to develop diabetes
- Arthritis: Excess weight puts strain on joints
- Liver Disease: Hepatic lipidosis from rapid weight loss
- Reduced Lifespan: Obese cats live 2-3 years less on average
Using this calculator helps you provide the right amount of food for your cat's specific needs.
Feeding Tips & Best Practices
- Divide Daily Calories: Split into 2-3 meals to prevent hunger and regulate metabolism
- Measure Food: Use a kitchen scale or measuring cup for accuracy
- Account for Treats: Treats should not exceed 10% of daily calories
- Monitor Weight: Weigh your cat monthly and adjust calories as needed
- Consult Your Vet: Always discuss dietary changes with your veterinarian
Frequently Asked Questions
How accurate is this calorie calculator?
This calculator uses the standard RER/MER formulas used by veterinary nutritionists. While individual cats may vary by ±10-15%, it provides an excellent starting point for determining calorie needs.
Should I use current weight or ideal weight?
For weight maintenance, use current weight. For weight loss, use your cat's ideal weight and consult your vet for a supervised weight loss plan.
My cat is overweight. How do I help them lose weight?
Gradual weight loss is crucial. Reduce calories by 10-20% from maintenance needs, increase activity, and work with your veterinarian. Never starve your cat or reduce calories too quickly.
Do indoor cats need fewer calories?
Yes, indoor cats typically need fewer calories than outdoor cats due to lower activity levels. Use the "Neutered Adult" or "Senior Cat" multipliers for most indoor cats.
How do I convert my cat's weight from pounds to kilograms?
1 pound = 0.453592 kilograms. You can use the unit toggle in the calculator to switch between units automatically.
References & Veterinary Sources
- Association of American Feed Control Officials (AAFCO) Cat Food Nutrient Profiles
- Waltham Petcare Science Institute - Feline Energy Requirements
- Pet Nutrition Alliance - Calorie Calculator Methodology
- Journal of Veterinary Internal Medicine - Feline Obesity Studies