Rent Split Calculator
Enter the total rent and the square metres of each bedroom plus the shared space. The calculator prices every metre once: private rooms cost their own area, common space splits equally - and the bigger room pays more for reasons nobody has to argue about.
Split apps ask for your bank details; flatmates argue in feelings. This one shows the arithmetic in one line, then prices the real-world adjustments - en-suites, couples, bills - that the raw metres cannot see.
How to use
- Measure each bedroom and the shared space roughly - a tape and five minutes beat estimates by feel.
- Enter the total rent and the three areas.
- Read both shares, agree them in writing the week you move in, and note the renewal date.
Frequently asked questions
How should rent be split between roommates?
By square metres with shared space equalised: common area cost splits per tenant, each private room bills its own metres. It is the only split that survives the bigger-room argument without a fight - the maths is the referee.
Should the bigger room cost more?
Yes, by exactly its share of square metres - typically 10-20% more than the small room. Premium features worth more than metres (en-suite, double glazing, built-in wardrobes) add a further 5-10% by agreement, not by formula.
How do couples split rent in a shared flat?
The couple takes one room price plus half a share of the common area, since two people wear the kitchen and bathroom like two tenants but occupy one room. A single roommate should never subsidise a couple's cohabitation discount.
How should utility bills be split?
Equally - nobody heats half a flat and the meter cannot tell roommates apart. Streaming and personal shopping go by user; anything usage-heavy (a grow-room of computers, an aquarium) bills its owner. Review the split at every renewal, in writing.