Rent Split CalculatorSplit rent fairly with roommates, by room size, income or evenly
Split rent and utilities fairly between roommates using the hybrid method (shared space split equally, bedrooms by size, plus a private-bathroom premium) or switch to room size, income or equal splits.
- 4 fair-split methods
- Private bathroom premium
- Utilities included
- Floor plan view
Rent split calculator
Monthly split
Floor plan view
Each room’s width reflects its share of private space. The shared strip shows common areas split evenly.
What is the fairest way to split rent with roommates?
The fairest common method is a hybrid split. Part of the rent, often 30–50%, pays for shared spaces (kitchen, living room, hallways) and is split equally. The rest is split by bedroom size, with a premium for a private bathroom. On $2,400 rent with 40% for common areas, each of three roommates pays $320 for shared space. The remaining $1,440 is divided by room size, so the 180 sq ft room with its own bathroom pays the most. Equal and income-based splits are simpler alternatives.
The four methods compared
| Method | How it works | Best when |
|---|---|---|
| Equal | Rent ÷ number of roommates | Rooms are similar in size and features |
| By room size | Rent × (your room ÷ all bedrooms) | Bedrooms differ a lot and common space is small |
| Fair hybrid | Common share split equally + private share by size (+ bath premium) | Everyone uses the shared spaces, but rooms differ |
| By income | Rent × (your income ÷ total income) | Couples or close friends with very different incomes |
Hybrid formula and worked example
Common share = Rent × Common % ÷ RoommatesRoom value = Room sq ft × (1 + bath premium if private bath)Your rent = Common share + Rent × (1 − Common %) × Your room value ÷ Total room valueExample: $2,400 rent, 40% common, 10% bath premium. Room values: Alex 180 × 1.1 = 198; Jordan 140; Sam 110; total 448. Common share is $320 each. Private pool is $1,440. Alex pays $320 + $1,440 × 198/448 = $956, Jordan $320 + $450 = $770, and Sam $320 + $354 = $674.
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Sharing a home means sharing other costs too:
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Manzoor Ahmad
Calculator Developer · Founder of DexoCalc
I’m a pharmacist turned web developer with 13+ years of experience building web tools. I built this calculator around the hybrid method because it’s the one roommates most often agree feels fair, and it shows its formula so nobody has to argue about the maths.
Published · Last reviewed · Author profile · Report an issue
Splitting rent: frequently asked questions
Divide each bedroom’s square footage by the total bedroom square footage, then multiply by the rent. Most people prefer the hybrid method, where shared spaces are split equally first, because everyone uses the kitchen and living room equally.
It depends on size and features. Using the hybrid method with a 10–20% private-bathroom premium, a master bedroom typically pays 15–35% more than a small room.
There’s no fixed rule. 30–50% is common, and you can set it with the slider. A larger shared space justifies a higher common share.
It can be, especially for couples or close friends with very different incomes. Everyone pays the same share of what they earn. All roommates should agree to it up front.
Usually evenly, since everyone uses shared utilities. The calculator adds an equal utility share to each person. To see what one high-use appliance costs to run, use the electricity cost calculator.
Yes. The calculator only uses room sizes in proportion to each other, so square meters work just as well as square feet.
Sources & references
- Consumer tools: budgeting and housing costs, Consumer Financial Protection Bureau
- Tenant Rights, Laws and Protections, US Department of Housing and Urban Development
This is a fairness guide, not legal advice. Your lease usually makes all tenants jointly responsible for the full rent, whatever you agree among yourselves.