The feeding instructions on the cat food package provide general guidelines that will help you to estimate an initial volume of food to offer to your kitten. Divide that amount by the number of meals per day to calculate the volume per meal. Here are some tips for monitoring your kitten’s food consumption:

After you measure the estimated amount of food into his bowl, allow your kitten 15 to 20 minutes to eat. Any food that is not eaten within that time should be taken up. Offer food again later in the day, again noting the amount that is fed and whether or not your kitten leaves some of the food
After a few days, you should be able to determine an approximate quantity that your kitten requires to maintain a normal body condition. This usually entails slightly increasing or decreasing the recommended amount on the package guidelines.
As your kitten grows, the total amount of food that he needs each day will gradually increase until he reaches adulthood. His energy needs will stabilize and then decrease slightly once he is an adult. Caution: It is easy to over-feed young adult cats! Be careful not to over-feed your cat once he is mature!
Provide a quantity of food that supports growth and muscle tone, but does not cause your kitten to be overweight. When in proper body condition, your kitten's ribs should not be visible, but should be easily felt without a heavy layer of fat under the skin.

Helpful Tip

While some cats are able to maintain normal body weight and a healthy body condition when given unlimited access to food (free-choice feeding), other cats tend to over-consume and gain weight when they know that an endless supply of food is available. Moreover, some pet owners find it difficult to feed their cat free-choice because of competition between pets within the household or because they are providing different foods to different pets. In these cases, feeding two or more pre-measured meals per day is the best feeding approach.