Rent Split Calculator: Split Rent by Room Size
The big room shouldn't cost the same as the box room. Enter the rent and each bedroom's size to see a fair split everyone can agree on.
Your home
Kitchen, lounge and bathroom everyone uses. The rest is split by bedroom size.
Fair rent each
Add the rent and at least one room size to see the split.
How this rent split works
Splitting rent equally is quick, but it's rarely fair when one person has the double with the bay window and another has the box room. This calculator uses the method most flat shares settle on: everyone pays the same for the space you all use, then the rest follows the size of your own room.
Once rent is agreed, the bills are the next argument. Split energy, broadband and council tax with the bill splitter, or check what you can afford first with the rent affordability calculator.
Rent split questions
What is the fairest way to split rent?
Split the shared parts of the home equally, because everyone uses the kitchen, lounge and hallway the same. Then split the rest by the private space each person gets. A bigger bedroom or an en suite pays more, a box room pays less, and the total still adds up to the rent.
How much of the rent should count as shared space?
Half is a sensible starting point for a typical UK flat share. Push it higher if the bedrooms are similar and most of the home is shared. Lower it if the rooms are very different, for example a large double with an en suite next to a single.
How do I measure a room?
Multiply the length by the width in metres. A 4m by 3m room is 12m². Rough measurements are fine, as long as you measure every room the same way. Many listings also show room sizes on the floor plan.
How is an en suite counted?
An en suite adds 3m² of private space to that room, roughly the size of a small shower room. That means its owner pays a bit more without one feature outweighing everything else.
Should a couple sharing a room pay double?
Not for rent: they use one bedroom, so the room-size share is the same. Many households ask couples to pay a little more of the shared share or the bills, since two people use the kitchen, hot water and energy. Use the bill splitter to split the bills separately.
Rent sorted. Now the bills.
The Life Buddy keeps rent and every household bill in one place, shows who pays what, and tells each of you what's left after bills. No bank connection.
No card needed. From £3/month after.