Split rent by room size calculator
Put in the rent and the square footage of each bedroom. Everyone pays for the room they actually have, and the shared space stays even.
The rent & the roommates
Splitting by each room's share of total square footage.
Each person's share
$2,400.00 a month across 3 roommates. Shares always add up to the full rent, down to the cent.
How the room-size split works
Add up the bedrooms, and each person's share is their room over that total. Somebody in 180 square feet of a 440-square-foot house pays about 41% of the rent. The number falls out of a tape measure rather than out of an argument, which is most of why this method holds up.
The shared space is the part people get wrong. The living room, the kitchen and the bathroom get used by everyone about equally, so those belong in an even split rather than in the square-footage one. Folding them in charges the big-bedroom person twice for space they do not have exclusive use of.
Where square footage stops being the whole answer
A room with its own bathroom is worth more than its floor area says. So is the one with the good light, and so is not being the room sharing a wall with the kitchen. Measure first, then adjust once, together, and write the final number down. The measurement is there to move the conversation off "who wants it more".
Then stop doing it every month
Rent is the easy part, because it's the same number each time. The hydro bill, the internet and the shared groceries are what turn into a tally nobody trusts. Enter the split above in dvup once as a recurring custom split, and put the variable bills against a household balance that never resets. The who owes who calculator squares everyone up when the time comes, and how to split rent with roommates covers picking between the three methods. If income is the fairer axis for your household, use the split rent by income calculator instead.
Questions
How do you split rent by room size?
Measure each bedroom, add the square footage together, and each person pays their room's share of that total. The shared space (living room, kitchen, bathroom) comes out of the part everyone splits evenly, so a bigger bedroom costs more but nobody pays extra for the sofa.
Should the shared space count in the calculation?
Usually not, and that's the point. Everyone uses the kitchen the same amount, so folding it into the per-room number charges the person with the big bedroom twice. Split the shared portion evenly and apply square footage only to the bedrooms.
What about an ensuite, a closet, or a window?
Square footage is a starting point, not a verdict. An ensuite bathroom, a walk-in closet, or being the only room without a window are all worth an adjustment everyone agrees on. Work out the footage split here, then nudge it and write down the number you landed on.
Is splitting by room size fairer than splitting evenly?
When the bedrooms are genuinely different, yes, and it's easier to defend because anyone can check the measurements. When the rooms are close in size it just adds arithmetic to a decision nobody was arguing about.
Does dvup split by room size automatically?
No, and it's better to say so now than after you install it. dvup splits equally or by a custom split where you set each person's share. That's what this calculator is for: it produces the amounts, and you enter them once in the app as a recurring custom split.
Set it once, then forget it
Enter the split as a recurring custom split and let rent land on its own every month. Free on iOS and Android.