Cat Calorie Calculator
Find out exactly how many calories your cat needs each day. Uses the veterinary-standard RER/DER formula, adjusted for your cat’s unique life stage and lifestyle.
All fields are required for an accurate result. Takes under 30 seconds.
*Cups estimate: Based on ~350 kcal/cup (average cat kibble). Wet food (3 oz cans) averages ~85 kcal/can. For precise portions based on your specific food brand, use our Cat Feeding Calculator.
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Veterinary Disclaimer
This calculator is intended for informational purposes only and does not constitute veterinary advice. Individual cats have unique nutritional needs based on their health status, underlying conditions, and specific metabolic rate. Results represent general estimates using the widely accepted RER/DER formula (AAFCO/NRC standards). Always consult a licensed veterinarian or board-certified veterinary nutritionist before making significant changes to your cat’s diet, especially if your cat has a medical condition, is pregnant, nursing, or is significantly overweight or underweight.
| Life Stage | Multiplier |
|---|---|
| Kitten <6mo | ×2.5 |
| Kitten 6–12mo | ×2.0 |
| Intact female | ×1.4 |
| Intact male | ×1.6 |
| Neutered | ×1.2 |
| Indoor/Less active | ×1.0 |
| Weight loss | ×0.8 |
| Senior (10+) | ×1.1 |
| Pregnant | ×2.0 |
| Nursing (small) | ×2.5 |
| Nursing (large) | ×3.5 |
Fewer calories than dogs: Cats need significantly FEWER calories per kg than dogs due to their unique metabolism.
Indoor cats: Need fewer calories than outdoor cats — obesity is the #1 feline health issue.
Neutered cats: Metabolism slows 20–30% after surgery. Adjust portions accordingly.
Meal frequency: Cats should eat 2 meals/day minimum to avoid hepatic lipidosis.
Track your cat’s weight over time, log meals, and get smart alerts when calorie needs change.
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