How this tool works
The room-size method shares the common-area portion of rent equally and splits the rest by private square footage — adjust the common-area share with the slider. Read renting with roommates for tips on writing a roommate agreement.
Frequently asked questions
What's the fairest way to split rent?
When rooms differ, splitting by room size (with common space shared equally) is usually seen as fairest. Couples often prefer splitting by income.
Should a private bathroom cost more?
Commonly, yes. Add its square footage to that roommate's room size.