Rent Splitter
Compare a proposed rent split. Use equal shares or room-size weights, and choose what portion of rent is shared equally.
Adjust the example values, then calculate your split.
How to split rent
01 / The workflowEnter total monthly rent
Use one currency for all amounts. Add each roommate and a positive weight, such as their private room area.
Choose the shared portion
This percentage of total rent is divided equally. The remainder is allocated in proportion to the weights. Use equal weights for a fully equal split.
Compare and agree
Review the breakdown together. Adjust weights for agreed room differences and confirm everyone accepts the result.
Know what to expect
02 / Details matterA discussion aid based on your inputs. Room size alone does not account for light, noise, private bathrooms, lease terms, or personal preferences.
The formula
Each share is total rent × shared percentage ÷ people, plus total rent × remaining percentage × individual weight ÷ sum of weights.
Use consistent units
If weights represent room size, use square feet for every room or square meters for every room. Do not mix units.
Fairness needs agreement
The calculation makes one allocation rule transparent. It cannot decide which rule is fairest for your household.
Questions, answered.
03 / FAQCan rent be split equally?
Yes. Give every roommate the same weight, or set the shared portion to 100%.
Can I split rent by bedroom size?
Yes. Use each room’s area as its weight, with consistent units. You can also enter agreed custom weights.
Are utilities included?
Only if you deliberately include them in the total. Utilities are not calculated or retrieved separately.
Is this an optimization or bidding system?
No. It is a transparent weighted formula, not an envy-free allocation algorithm.