Divide Your Rent Fairly

How does this work?

The division method used here is designed to produce an “envy-free” division of the rooms of a shared apartment, i.e. no one will want to swap their room and price for someone else’s.

It is unfortunately beyond the scope of any algorithm to keep you from envying your roommate’s job, sex life or wardrobe — or save you from buyer’s remorse.

With each decision about which room to take at different prices, the algorithm becomes more accurate. It learns more about how much each roommate likes each room and narrows the range of prices it thinks might be fair.

This calculator should work for almost all situations, but there are a few scenarios in which it will fail. It won’t work if for example, there are divisions of the rent where one roommate would find every room unacceptable. It also won’t work if, even when one room is free one roommate would still take the most expensive room.

It’s likely though that in those cases there simply doesn’t exist any acceptable division of the rooms and you should either look for either a less expensive apartment or different roommates.