Split rent fairly among roommates based on room size, amenities, bathroom access, and natural light using weighted allocation.
Instead of dividing the rent evenly, or by square footage alone, this tool scores every room on four factors - size, amenities, bathroom access, and natural light - combines those scores into one weighted figure per room, and converts each room's weighted share of the total into a percentage of the monthly rent. The dollar shares always add up to the full rent, and the split scales automatically if the rent changes. The thing people get wrong: the weighting itself is a judgment call. A private bathroom or a big window is worth some number of points, and the scheme in use decides how many, so the same rooms can yield different, equally defensible splits.
A concrete input and expected output from the current implementation.
Input
Monthly rent: $2,700. Three roommates. Every room: 140 sq ft, no amenities, shared bathroom, average natural light.
Expected output
$900.00 per roommate, one third of the rent each; the three shares total $2,700.
Identical scores on every factor produce identical points, so the weighted allocation collapses to an even split: 2,700 divided by 3 is 900. It is the one output you can verify by hand, which makes it a useful sanity check before trusting the tool with unequal rooms.
Every room is scored on the four factors and the scores are normalized so they sum to a fixed total. A room's share of the rent is its score divided by the total score, multiplied by the monthly rent. Because the split is proportional, the percentages always add to 100 and the dollar shares always add to the full rent, even if the rent changes between runs.
Room size is a measured number, typically square feet or square meters, while amenities, bathroom access, and natural light are entered as ratings or simple yes/no choices. The tool converts all four to a common scale so different rooms can be compared directly - a small room with a private bath versus a large room with a shared one - and reports each roommate's monthly dollar amount.
No. The split is a private arrangement between roommates. What the landlord can collect is governed by the lease, and every tenant named on it is typically jointly responsible for the full rent regardless of any calculator output. Write the agreed split into a signed roommate agreement, but expect the landlord to look to the lease, not the calculator.
Because size is one of four factors, not the whole score. A smaller room with an en-suite bathroom or strong natural light accumulates points on the other factors, so its percentage rises above the area-based figure. That is the tool's purpose: a broader definition of what a room is worth than floor area alone.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
Calculate gross, operating, and net profit margins from cost and revenue with breakeven analysis.
Convert between annual salary and hourly rate with adjustments for work hours, overtime, and benefits.
Calculate sales tax amounts, tax-inclusive and tax-exclusive prices for any tax rate or jurisdiction.
Calculate return on investment from initial cost and final value with annualized ROI and comparison tables.
Convert between markup and margin percentages, calculate selling price, and compare pricing strategies.
Convert numeric amounts to written words for invoices, checks, and legal documents in multiple currencies.