Daily feeding plan
Cat Food Calculator
Calculate daily cat calories, wet and dry food portions, meals, treats, weekly shopping and estimated cost with a visual feeding plan. Adjust portions easily.
Build your cat's feeding plan
Use the food label and your veterinarian's target weight when available.
How the cat food estimate works
The calculator uses RER = 70 x kg^0.75, then applies a multiplier for indoor, active, kitten or weight-loss situations. It subtracts treat calories and splits the remaining calories between wet and dry food.
- Measure food with a scale when possible for better accuracy.
- Use the calories from the exact food label.
- Track weight and body condition over time.
Cat feeding tips
- Many indoor cats need fewer calories than package estimates suggest.
- Wet food can help some cats increase water intake, but calorie density varies.
- If your cat has kidney disease, diabetes, urinary issues or obesity, follow veterinary guidance.
Cat calorie multiplier guide
| Cat situation | Starting multiplier | Notes |
|---|---|---|
| Weight loss plan | 0.8 x RER | Vet supervision is strongly recommended. |
| Low activity adult | 1.0 x RER | May fit some sedentary indoor cats. |
| Neutered indoor adult | 1.2 x RER | Common maintenance starting point. |
| Active or intact adult | 1.4 x RER | For higher activity or intact cats. |
| Kitten growth | 2.5 x RER | Growth needs vary; use kitten food and vet advice. |
Sources and safety notes
The RER formula is described by the Merck Veterinary Manual. Body condition and nutrition assessment tools are available from the WSAVA Global Nutrition Guidelines.
Cat Food Calculator FAQ
How many calories should my cat eat per day?
This calculator estimates calories using RER and a cat-specific activity or life-stage multiplier. Indoor, neutered and overweight cats often need fewer calories than active or growing cats.
What formula does the Cat Food Calculator use?
It uses RER = 70 x body weight in kilograms to the 0.75 power, then applies the selected multiplier to estimate daily calories.
Can I mix wet and dry food?
Yes. Enter the calorie density for dry food and wet food, then choose the wet-food calorie percentage. The calculator splits the daily calorie target between them.
Should cats lose weight quickly?
No. Rapid weight loss can be dangerous for cats. Any weight-loss plan should be supervised by a veterinarian.
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