Rent Split Calculator
Split shared rent fairly between housemates based on room size, ensuite access or equal shares.
Your results
Calculation breakdown
- Share
- total rent × (housemate weighting ÷ sum of all weightings)
Worked example
$900 rent split by weightings 1.2, 1.0 and 0.8 (total 3.0) gives $360, $300 and $240 respectively.
Assumptions
- Weighting is a household agreement, not a fixed formula, and commonly reflects room size or ensuite access.
How this calculator works
Enter the total rent and each housemate's room weighting (for example, larger rooms or ensuites weighted higher) to calculate a fair proportional rent split between three housemates.
Frequently asked questions
What if all rooms are the same size?
Give each housemate an equal weighting (e.g. 1 each) and the calculator will split the rent evenly.
How should I weight an ensuite or larger room?
There's no fixed formula — commonly used approaches give an ensuite room 15–25% extra weighting, but it's ultimately a household agreement.
Can this handle more than three housemates?
This version supports three; for more housemates, calculate proportional weightings against the total and apply the same method manually.
Results are estimates only and are not financial, tax, legal or credit advice.