Hello how may I help you? How much space does my cat need? What type of cat do you own? I don't know. It's black and fat. For most cats, the average amount of space they need is about 200 square feet per cat. I have him in a cardboard box right now. Is that big enough for him? A cardboard box is not enough space for a cat. It is recommended to give your cat a good amount of space in your home, with a little box and toys. Okay. I will take him out of the box. Good. Do you have any more questions about your cat that I can help you with? No. That's it. Thanks. You are most welcome!