Just as people vary different cats have different nutritional requirements. Estimated energy requirements are based on the weight of each animal as well as the average amount of energy various tasks require. The chart below illustrates the recommended caloric intake each day for felines of different weights. However the suggested amount of calories consumed daily will vary dependent on the age of the cat and physical stature.

For growing kittens multiply the Resting Energy Requirement (RER) x 2.5.

For maintenance of adult cats alter the RER as follows:
normal neutered adult: multiply RER x 1.2
intact adult: multiply RER x 1.4
obese-prone: RER remains as listed
for weight loss: multiply RER x 0.8