Can my rat live in a hamster cage?

I used 2 have a hamster. He died. Now I might get a rat. I'm not rich & dont wanna play 4 a new cage but i dont want my rat 2 b squwished in a hamster cage. Is my hamster cage 2 small 4 a small rat?
Update: It is just a regular sized hamster cage. I'm kind of afraid he might get stuck in the tube...
9 answers 9