How long is it supposed to it take for a sprained ankle to heal?

10 weeks: It depends on the severity of the injury. Sprains can be grade 1 (strained), 2 (partial tear), or 3 (complete disruption of the ligament). Grade 1 tears typically progresse at a rate of 8 to 10% per week for 10 to 12 weeks. A grade 3 tear can take up to a year. After a sprain, you should do ankle stengthening exercises to prevent re-injury from occurring when you return to full activity.

Depends on severity.: Could take weeks to months.

Several months: Depending on severity it can take several months.