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Cat Food Calculator

Calculate daily food portions for your cat based on weight, age, and activity — with guides for kittens, indoor cats, and seniors

Food type & calories
Typical cat weights
Siamese: 3-5 kg
Persian: 3-5.5 kg
British Shorthair: 4-8 kg
Maine Coon: 5-11 kg
Ragdoll: 4.5-9 kg
Bengal: 4-7 kg
Domestic Shorthair: 3.5-5.5 kg
Sphynx: 3-5 kg

About This Tool

Cats are obligate carnivores with unique nutritional needs. Unlike dogs, they require precise feeding — too much leads to obesity (especially in indoor cats), too little causes malnutrition and organ problems. This calculator determines your cat's daily caloric needs based on weight, age, activity level, and whether they're spayed/neutered. Get exact portions in grams for dry food, wet food, or a combination of both. Special adjustments for kittens, indoor-only cats, seniors, and cats on weight management. Based on AAFCO and FEDIAF nutritional guidelines used by veterinarians worldwide.

How to Use

1. Enter your cat's current weight (kg or lbs) 2. Select life stage (kitten, adult, senior) 3. Choose activity level and indoor/outdoor status 4. Mark if spayed/neutered (affects metabolism) 5. Enter food calorie info or use defaults 6. See daily portions for dry food, wet food, or both

Frequently Asked Questions

How much food does a cat need per day?
An average 4kg (9lb) adult indoor cat needs about 200-250 calories per day, which is roughly 50-65g of dry food or 1-1.5 cans of wet food. Active outdoor cats need 20-30% more. This calculator gives you exact amounts for your cat.
How do I calculate calories for my cat?
Use the formula: RER = 70 × (weight in kg)^0.75 for Resting Energy Requirements. Multiply by a factor (0.8-1.4) based on activity and life stage. A typical 4kg cat has RER of ~160 kcal, with MER around 200-250 kcal for normal activity.
Should I feed my cat wet or dry food?
Both have pros and cons. Wet food provides hydration (important since cats often don't drink enough), is lower in carbs, and cats usually prefer it. Dry food is convenient, helps dental health, and is more calorie-dense. Many vets recommend a mix of both.
How often should I feed my cat?
Adult cats can be fed 2-3 times daily or free-fed if they self-regulate. Kittens need 3-4 meals until 6 months. Overweight cats should have measured portions 2× daily. Most cats do best with scheduled feeding rather than free access.
Why do indoor cats need less food?
Indoor cats are typically 30-40% less active than outdoor cats. They also maintain a more stable body temperature. Without adjusting portions, indoor cats easily become overweight. Use the 'indoor' setting for accurate calculations.
How much should I feed a kitten?
Kittens need 2-3× more calories per kg than adults for growth. A 2-month kitten needs about 200 kcal/kg body weight. Feed kitten-specific food 3-4× daily until 6 months, then 2-3× daily until 12 months when you can switch to adult food.

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