Please tell me how long it takes for to get oral cancer from chewing tobacco?

Usually years: It often takes years to develop oral cancer from chewing tobacco, however, there have been cases of teens developing oral cancer due to genetic susceptibility. Since one does not know one's genetic susceptibility, it is strongly advised to stay away from all tobacco products.

Same answer as snuff: There's no exact amount of time needed to develop oral cancer when using chewing tobacco; it could be 1 year, it could be 50 years, it could be never. One thing is for certain though, the more you use, the more likely you are to get it.