Cat Food Calculator
Enter your cat's weight and life stage to calculate daily food portions.
Enter your cat's weight and life stage to calculate food portions.
How It Works
The cat food calculator determines your cat's daily food requirement based on weight, age, activity level, and whether you feed wet food, dry kibble, or a combination. Cats have unique nutritional needs that differ significantly from dogs — they are obligate carnivores requiring high protein diets with specific amino acids like taurine that they cannot synthesize on their own.
Base: 30 × Weight(kg) + 70
Activity Multipliers:
Indoor/Sedentary: × 1.0
Normal Activity: × 1.2
Active/Outdoor: × 1.4
Kitten (under 1yr): × 1.6
Senior (7+): × 0.9
Wet Food: ~80-100 kcal per 100g
Dry Food: ~350-400 kcal per 100g
Understanding Cat Caloric Needs
An average 4kg adult indoor cat needs approximately 190-250 calories per day. This translates to roughly 60-70g of dry food or 200-250g of wet food daily. Kittens under one year need significantly more calories per kilogram of body weight because they are growing rapidly — a 2kg kitten may need nearly as many calories as a 4kg adult. Senior cats over 7 years typically need 10-15% fewer calories as their metabolism slows, but they may need more easily digestible protein to maintain muscle mass.
Wet vs Dry Food
Wet food contains 70-80% water, providing natural hydration that is particularly important for cats — who evolved as desert animals and often do not drink enough water on their own. Dry food is more calorie-dense and convenient for free-feeding, but exclusive dry diets may contribute to chronic dehydration and urinary tract issues. Many veterinarians recommend a combination of both: wet food for hydration and dental variety, dry food for convenience and dental health through mechanical cleaning action.
Weight Management
Obesity affects an estimated 60% of domestic cats in developed countries and leads to diabetes, joint problems, and shorter lifespan. If your cat needs to lose weight, reduce daily intake by 15-20% rather than drastic cuts — rapid weight loss in cats can trigger hepatic lipidosis, a dangerous liver condition. The calculator helps you find the right portion size for your cat's ideal weight, not their current weight, making it a practical tool for gradual, safe weight management over months.
Feeding Schedule
Most adult cats do well with two meals per day — morning and evening. Kittens under 6 months benefit from three to four smaller meals. Free-feeding dry food works for some cats but can lead to overeating in others. Measured portions at set times give you the most control over your cat's caloric intake and make it easier to notice appetite changes that might indicate health problems. The calculator provides daily totals that you can split across your preferred number of meals.
Tips & Recommendations
70 × weight^0.75 = resting energy need. The scientific foundation.
Enter kcal/100g from the package — key to accurate portions.
Weigh monthly and adjust. If gaining, reduce portions by 10%.
Wet food provides hydration. With dry food, always keep fresh water available.
Frequently Asked Questions
How much should I feed my cat?
Depends on weight, age, and activity. A 4kg adult cat needs about 200-280 kcal/day (60-80g dry food).
How often should cats eat?
Adults: 2 meals/day. Kittens: 3-4 meals/day. Some cats do well with controlled free-feeding.
Wet or dry food?
Both are nutritionally complete. Wet food has more moisture (good for hydration). Many vets recommend a mix.
How do I know food calories?
Check the package label for 'metabolizable energy' or kcal/100g. Dry food: 300-400 kcal/100g. Wet: 70-100 kcal/100g.
Should I adjust for neutered cats?
Yes. Neutered cats need 20-30% fewer calories. Use 'Indoor Adult' or 'Overweight' setting.
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