Rent Split by Room Size Calculator
Split rent fairly among roommates by bedroom size — bigger rooms pay proportionally more.
How it works
Room share = total rent × room size ÷ total bedroom size
Splitting rent evenly feels fair until one roommate has a master suite and another a closet-sized room. Prorating by bedroom square footage ties each person's rent to the private space they actually get, which most housemates find fairer. Shared areas — kitchen, living room, bathrooms — are treated as used equally and left out of the weighting, so only private rooms drive the split.
Worked example
On $2,400 rent with bedrooms of 200, 150 and 130 sqft (480 sqft total), the 200-sqft room pays 2,400 × 200 ÷ 480 = $1,000, the 150-sqft room pays $750, and the 130-sqft room pays $650 — the three add back to $2,400.
Frequently asked questions
Should shared space count?
This method assumes everyone uses the kitchen, living room and bathrooms equally, so only private bedroom size is weighted. If one room has a private bathroom or balcony, add its square footage to that room to reflect the extra private space.
Is splitting by size actually fairer?
It is one fair approach — it matches rent to private space. Others weight for closets, windows, noise or en-suite bathrooms. Use this as a starting point and adjust for features everyone agrees add value.
What if two people share one room?
Split that room's calculated share between its two occupants, or treat the couple as one payer for the room. Per-person, sharing a room is usually the cheapest arrangement.
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Educational estimate, not financial advice.