A typical cat sleeps for an average of 2/3 of their life. That's sixteen hours or more each day. Kittens and elderly cats tend to sleep longer than this.
Cats are predators, which means they love to chase and hunt, mainly at night. This includes hunting outside or even just their toys. This takes a massive amount of energy so it's no wonder they sleep so much during the day.
Cats, like humans, can doze or go into a deep sleep. When a cat dozes, he will usually sleep with his head raised and his paws tucked beneath his body so that he can spring up and into action at a moment’s notice. During deep sleep, cats experience rapid brain wave movement. Deep sleep tends to last about five minutes, after which the cat goes back to dozing. This goes on until the cat wakes up.
Cats are very adaptable creatures. They are able to change their sleeping patterns to make sure they don't miss food time or miss any attention!