<prompt> Human: I am in the searching for an apartment with 2 friends and my girlfriend. We found a place for 3000 for a 3 bedroom and my gf and I would split a room. What do you think a fair price assuming rooms are even in size I should pay?I thought 1300 for myself and 850 a piece for them was reasonable but they were thinking I should pay 1500 while they pay 750.I thought that was ridiculous since we are not getting two rooms out of it, what do you think?  <response>: I read that an arguably fair way to allocate rental costs between multiple roommates is to add up all the dimensions of each room, allocate a of the total cost to each room based on its squared area, then split the cost of public use rooms evenly.Ex. if you have a kitchenliving area that is 10 x 10, 2 single bedrooms that are 8 x 10, and a shared bedroom that is 12 x 10, you have:total area 380Shared living space 1002 bedrooms 80 each1 bedroom 120for 3,000 that would mean the cost of each area is :Shared living space 789.47 100 380 3000Small bedroom 631.58 80 380 3000Big bedroom 947.37 120 380 3000Since you all share the public space, you would each pay 197.37 for it one quarter. That means you and your girlfriend would be responsible for 947.37 197.37 197.37 1,342.11 while your two roommates would each be responsible for 631.58 197.37 828.95.So your shared price would be:You GF 1,342.11Roommate 1 828.95Roommate 2 828.95Total 3000.01 roundingSo you would have to adjust this based on room size and whether there are other common areas or private bathrooms etc. but it is a method, assuming I even did it correctly, that splits up common and personal space in a fair manner 