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Cat Calorie Calculator
Daily calories and feeding amount for a cat.
Results
- Daily calories (MER)
- 303 kcal
- Resting energy (RER)
- 216 kcal
- Cups per day
- 1.01 cups
RER × factor
RER = 70 × (kg^0.75)
MER = RER × 1.4
Most indoor adult cats need 180–250 calories per day. Confirm with your veterinarian.
A typical indoor adult cat needs about 180–250 calories per day, set by resting energy times an activity factor. Kittens and active cats need more; neutered cats need less.
Enter your cat's weight, status, and food density for daily calories and feeding amount.
How to calculate a cat's calories
To calculate a cat's calories, find resting energy (RER = 70 × kg^0.75), then multiply by a life-stage factor. Divide by the food's calories per cup or can for the amount.
Worked example: a 4.5 kg neutered indoor cat has an RER near 217 calories and a maintenance need near 260.
Frequently asked questions
Most indoor adult cats need 180–250 calories per day. Kittens and active cats need more; neutered indoor cats often need less.
Divide daily calories by the food's calories per cup or can. Measure portions to prevent overfeeding.
Neutering lowers metabolic rate and activity, so intact cats and kittens need a higher factor above resting energy.
Results are estimates based on population averages and are not medical advice. Consult a doctor or registered dietitian nutritionist (RDN) before making large changes to your diet, especially for deficits over 2 lb (0.9 kg) per week, during pregnancy or nursing, or for anyone under 18.