Rent Split by Room Calculator
The master with an ensuite should not cost the same as the small room by the kitchen. Enter room sizes and perks; the calculator prices each room fairly.
| Room 1 | — |
| Room 2 | — |
| Room 3 | — |
| vs an even split | — |
The weighted-room method
Room share = Rent × (room sq ft × perk multiplier) ÷ total weighted sq ft
The default example: $3,000 across rooms of 180 (with ensuite), 140, and 110 sq ft prices them at about $1,392 / $903 / $709 — instead of $1,000 flat. The ensuite premium (+20%) reflects what private bathrooms actually add in rental markets; adjust it for balconies (+10%), walk-in closets (+5–10%), or a basement room with poor light (−10–15%) by editing the size input.
Common areas are already handled
Kitchens and living rooms benefit everyone equally, so they stay out of the weights — the method splits only the bedroom value difference, which is exactly the part people argue about. Utilities and internet still split evenly (usage is shared) — use the bill split calculator for those, including its by-income mode.
The auction alternative
For deadlocks, economists suggest the envy-free auction: everyone privately bids what each room is worth to them; highest bidder gets each room, and prices adjust so bids sum to the rent. In practice, this calculator plus one honest conversation reaches the same peace with less drama.
Frequently asked questions
How should we split rent with different sized rooms?
Weight each room by size, multiply by perk factors (ensuite +20% is standard), and divide the rent proportionally. A 180 sq ft ensuite room fairly pays ~$1,390 of $3,000 rent while a 110 sq ft room pays ~$710.
How much more should the master bedroom pay?
Typically 20–40% above an even split, driven by size plus the bathroom. The calculator prices it from your actual dimensions instead of a guess.
Do common areas count in the split?
No — shared spaces benefit everyone equally, so only bedroom differences are weighted. That is also why utilities stay evenly split.
What if someone thinks their share is still unfair?
Adjust the multipliers together (light, noise, floor level are legitimate factors), or run the envy-free auction: private bids for each room, highest bid wins it, prices scaled to total the rent.
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Last updated: 2026-07-08