LINSAY LOHAN COULD SPEND MORE THAN A YEAR IN JAIL

Lindsay Lohan could be sentenced to nearly a year-and-a-half in jail if Judge Stephanie Sautner decides she violated her probation ... TMZ has learned.

We're told the computations are complicated, because Lindsay has had so many cases.  But based on the 120 day suspended sentence for shoplifting, time served under house arrest, and her prior DUIs, Lindsay could be thrown in jail for a long, long time.