Sure, it didn't cost you anything to get your library card, but how much is it worth? One of the new features of our Tigard Library website is a Library Use Calculator. Plug in how much you use your library in a month (number of books and movies you check out, computer time used, programs attended, etc.) and you can find out. My card is worth a cool $506 a month! Now that's some savings. Let us know how much your card is worth in the comments.