This splits a monthly rent between housemates whose bedrooms are different sizes. Bedrooms are priced by floor area, the kitchen, bathroom and living room are split per head, and the shares add up to the rent exactly rather than leaving a stray cent.
What to type in
- Monthly rent — the figure the landlord charges for the whole flat.
- Whole flat, floor area — from the lease or the letting advert. Bedrooms included. The units only need to be consistent, so m² or ft² both work.
- Each bedroom's area — from the floor plan, or a tape measure. Everything you do not enter as a bedroom is treated as shared space.
- Adjustments — optional, and in money rather than percentages: +60 for an ensuite, −25 for the room with no window. Whatever one person pays extra comes off the others.
- Shared monthly bills — optional. Split per head and shown on their own line, because bills buy consumption rather than floor space.
How to read the answer
Each person gets their monthly figure, and underneath it, what a bedroom-size-only split would have charged them instead. That second number is the method most rent guides describe: it applies each person's share of the bedroom area to the entire rent, which quietly prices the kitchen by bedroom size. Seeing both makes the difference concrete for your own flat rather than in the abstract.
"Show the working" breaks each share into bedroom, shared space and any adjustment, and tells you what fraction of your flat is shared space at all. If the two methods barely differ, that fraction is why — and it means the choice is not worth an argument.
Nothing is sent anywhere
The reasoning behind it
The method, a full worked example and the cases where it is the wrong tool — a couple sharing one bedroom, someone working from home, bills that should not be per head — are in the companion guide: how to split rent when the bedrooms are different sizes.