Rent Split Calculator
How it works
Splitting by room size adds up everyone's square footage, then gives each roommate that same fraction of the total rent — a 300 sqft room in a 900 sqft shared space pays a third of the rent, whatever the total happens to be. Splitting evenly skips room size entirely and divides the total rent by the number of roommates.
Frequently asked questions
How does splitting by room size work?
Each roommate's share is their room's square footage as a fraction of everyone's combined square footage, applied to the total rent — a room that takes up a bigger share of the shared floor space pays a proportionally bigger share of the rent, rather than everyone splitting it into flat, equal pieces.
When does splitting evenly make more sense than by room size?
When the rooms are all a similar size, the difference a size-based split would make is small and not worth the extra bookkeeping. It also suits a household that just prefers the simplicity of one flat number, regardless of small size differences between rooms.
Does this split utilities and other shared costs too?
No — this only splits the base rent. Shared utilities, groceries, and other costs are a separate conversation this tool doesn't model, especially since roommates often want to split those unevenly based on who used what. The Group Expense Splitter is the sibling tool for working out who owes whom on costs like that.