Roommates
Enter the rent, choose a simple split basis, and copy a neutral explanation your roommates can review before everyone agrees on the final numbers.
Learn how this calculation works
Why use RentSplit
RentSplit keeps the math and assumptions in one place, so roommates can discuss the split without turning it into a personal argument.
Start with room size, then keep any private-bath or feature premium visible so the group can review the same assumptions. If one room is clearly the master bedroom, use the master bedroom rent split calculator to estimate how much more the larger room should pay.
When two people share one room, split only the common-space portion by people instead of turning the whole rent into a per-person bill. If a couple shares one bedroom and a single roommate takes another room, use common-space share to separate room value from people count.
Send the result with the rent, room amounts, and assumptions in one calm explanation instead of a messy spreadsheet screenshot.
This tool helps roommates compare a basic equal split with a room-size split. It also keeps optional assumptions, such as private bathrooms, shared rooms, parking, storage, light, privacy, or awkward layouts, visible instead of hiding them inside the result. For a pure area-based formula, use the square-footage rent split calculator. If the main difference is an ensuite or private bath, review the private bathroom rent split page.
The output is meant to support a calm discussion. It does not decide what is legal, morally required, or already promised in a lease or roommate agreement.
One common way to calculate this is an equal split: total rent divided by the number of rooms. This is quick when rooms are similar and everyone agrees the differences are minor.
Another common method is a bedroom-size split: each room pays based on its share of the total private bedroom square footage. If part of the rent should reflect common spaces, you can enable that section and split that portion by people in each room.
A useful explanation should name the total rent, the split basis, the rooms, and any adjustments. If the group changes a premium or discount, update the input and copy a new explanation so the assumptions stay visible.
Utilities, deposits, lease obligations, and already-signed agreements may need separate rules. This calculator focuses on monthly rent based on the assumptions entered.
There is no single rule that fits every household. Equal split is simple, while room-size split can feel more explainable when bedrooms differ. Visible premiums or discounts can cover features that square footage does not capture.
Usually utilities need a separate rule because they often depend on people, habits, and usage rather than room value. RentSplit focuses on rent unless you enable common-space assumptions.
Yes, use the common spaces section if part of the rent should be split by people in each room. The private bedroom portion can still follow the room-size or equal split basis.
Income-based rent split is a different agreement style and is more common for partners or household budgeting. For unrelated roommates, room value is usually the clearer starting point. Use the income split calculator when the household has explicitly chosen income as its basis.
You can use the calculator as a discussion aid, but it does not override a lease, signed agreement, or payment pattern everyone already accepted.
Lease terms and roommate payment arrangements are separate questions. This calculator is not legal advice and does not decide what anyone is required to pay under a lease.