Most Helpful Guy
For most guys it's somewhere between two weeks and 20 years.2
Most Helpful Girl
I think you're asking in the wrong place. It feels like Internet is full of men who think marriage is the worse thing that could happen to them.
That being said, I think it totally depends on your situation and where you live.
In my country, people usually propose after 5 or seven years... and that depends on the age of the couple. You don't really do it before 25.3