How many years does it take to study in the United States, get a green card, and then immigrate and apply for a green card for your parents?

This is 14. You can apply for naturalization in the United States after five years of green card, which takes about six months to apply. Then you can start applying for parents, about one to one and a half years. To sum up: you can get a green card in about 14 years, you can apply for parents' immigration in 20 years, and your parents can come to the United States in 22 years. This is a theoretical calculation. If you don't find a company that can help you apply for H 1 immediately after graduation, if the company doesn't agree to help you apply for a green card after work, this time will be difficult to calculate.