Paying your rent is never fun...or at least, that's what Mom keeps texting you, while you're out getting pedicures. For a new site that'll make it a little less excruciating for whoever's paying, SplitTheRent.org.
Launched by a Yale grad who's now a Harvard Ph.D. candidate in astrophysics (and probably thinks prior to the Revolutionary War, the economic modalities could most aptly be characterized as agrarian pre-capitalist, or something), STR calculates the fair market value for up to eight rooms in your house/apartment/tenement using info you provide and a "simple" price-per-square-foot formula, while making price adjustments based on room quality and amenities, so be sure to include that heat-lamped "garden" you keep in your tin foil-wrapped closet. The process is simple: enter the total cost of rent and number of rooms, then describe the size of each room on a scale of tiny-to-enormous with additional deets on stuff like windows (none/normal/awesome), closets (none/normal/huge), and "other", which accounts for extra considerations like private full/half bathrooms, bad sound insulation, awkward layout, or no doors, also a steadfast rule at New Haven Arena. Next you'll hook up info on the size of common areas -- they've even got a nifty interactive graphic that shows you a visual display of the size of each bedroom and the common areas to help you eyeball it -- then simply click "Calculate Rent" and the site's built-in algorithms take over, spitting out pretty accurate suggested dollar amounts for each room, though it may take up to 525,600 minutes.
Once you've got your rent, the site'll also allow you to provide feedback that's then used to tweak the calculator, including which rent prices you think would actually be fair and which room is in fact yours, though anybody could tell that by looking for the Cindy Crawford Got Milk poster and awesome LEGO collection.