3 years and depends on the school.....
http://www.ilrg.com/rankings/law/tui...desc/Tuition08
descending order highest to lowest (my school is currently just under $30k per year tuition and just under $15k for room and board)
tuition will almost certainly run a minimum of $30k - that doesn't account for books at >$500 per semester nor materials, cost of copying docs, beer and other less important living expenses. But $100k is probably a good guess to the amount of debt... not the cost. Which will be $100k financed over either 10, 15 or 20 years at whatever applicable rate. I refinanced mine for 20 years but pay at a ten year pace. Wanted the option if things got toough to be able to back off but wanted to make the higher payments... without the obligation.