Determine the weight of your cat and calculate how many calories it needs. Consult a veterinarian or pet nutritionist if you are unsure.
The amount of food you should feed your cat depends largely on the type of food, the age and size of your cat, and its activity level.
If you have a kitten, it will need to eat more than an adult cat to grow into its body weight. Kittens need up to three times as much protein as adult cats do.
If you have an overweight or obese cat, then it may need to eat less than a leaner one in order to avoid getting too heavy itself.