At what age can you go to collage?
Students that attend college right after high school are 17 to 19 years old and it takes 4 years.I turned 18 within a month of starting college.
18 in india
At what age are you after you graduate high school.
In the US, generally you are eligible to enroll in college after your class has graduated. If you do not graduate with your peers, then perhaps your choices may be limited.
Some high schools offer courses that can count as college credits, ask your school administration or call the school district to see what schools are available in your area.