homera
Menu

Homera is in alpha

A small group of homes is using it now and shaping it. Leave your email and we will invite your home when a spot opens.

New here? See what Homera does.

Rent split calculator

Split the rent fairly with your roommates. Evenly, by room size, or by income. Type your rent and watch each share appear. Free, instant, and no sign up.

One share per person. About 3 in 4 households do it this way.

The split

Enter your monthly rent to see the split.

Your split is sorted.

Things can change though. We are always releasing new tools and articles about sharing a home. Want us to send them your way?

How to use this calculator

  1. Enter your total monthly rent.
  2. Pick how your house wants to split it. "Split evenly" gives one share per person. "By room size" charges more for bigger and better rooms. "By income" ties each share to what each room earns.
  3. Add a room for each bedroom. Turn on the couple toggle if two people share a room.
  4. The split updates as you type. When it looks right, share the numbers with your house.

How this is calculated

The "by room size" mode treats your home as two parts. The shared part is the kitchen, living room, and everything you all use. The private part is the bedrooms. Research on real homes puts shared space near half of a home's value, so the slider starts at 50 percent.

Everyone pays an equal piece of the shared part. You all use it the same. The private part is split by bedroom size, in square feet. A room with its own bathroom counts about 19 percent extra. That number comes from a survey where roommates were asked what felt fair, and it is the only published number of its kind. Couples split their room's cost between them, but each pays a full share of the shared part.

A worked example. Rent is $3,000. Shared space is half, so $1,500 splits evenly among three people: $500 each. The bedrooms carry the other $1,500. A 150 sq ft room and a 100 sq ft room split it 60/40, so $900 and $600. The big room pays $500 + $900 = $1,400. The small room pays $500 + $600 = $1,100... and if a couple takes the big room, they each pay $500 shared plus $450 room, so $950 a person.

Every split adds up to your exact rent, to the cent. No method is "the one true answer". Fair is whatever your whole house says yes to. This tool just gives you a solid, neutral starting point.

Sources: the Splitwise fairness survey and calculator weights, a survey of about 1,000 US roommates on how houses split costs, and the math research on fair rent division (Su, 1999; Gal and others, 2016).

Common questions

Should the person with the bigger room pay more?
Usually, yes. A good rule: if the biggest room is about a third larger than the smallest, stop splitting evenly. Advice guides put the premium for a bigger or nicer room at 10 to 25 percent. The calculator does this math for you when you pick "By room size".
How much more should a room with its own bathroom cost?
The only real survey on this (by Splitwise, from asking roommates what felt fair) landed on about 19 percent more for that room. Advice sites tend to say 10 to 15 percent. We use the survey number as the default.
Should a couple pay more than one person?
Most houses land on yes. A fair frame: the couple splits the cost of their room between the two of them, but each of them pays a full share of the shared space. They both use the kitchen, after all. That usually works out to about 1.3 to 1.7 times what one person pays. The couple toggle in the calculator does exactly this.
Should we split rent by income?
Couples do this a lot. Just over half of couples who live together do not split housing costs down the middle. Between roommates it is less common, and some higher earners come to resent it. Talk about it openly first. The calculator has the mode if your house wants it.
What about a living room used as a bedroom?
A converted living room with no real door should cost a lot less. In the Splitwise survey, "no door" was the strongest single discount, near 37 percent off that room. Set that room’s size honestly and lower the shared-space slider, since your house now has less shared space.
How do most houses actually split rent?
About 3 in 4 split it evenly, per a survey of about a thousand US roommates. Even splits also caused the fewest money arguments. If your rooms are close in size, even is a fine answer.
What if we still cannot agree?
Agree before anyone signs or moves in, and write the number down. If your house wants a method with a fairness guarantee, look up "envy-free rent division". Tools like Spliddit ask everyone what each room is worth to them and find a split where nobody would trade places. Ours keeps it simpler on purpose.

The split is step one

Agreeing on the split is the easy part. Keeping it up every month is the hard part. Homera runs that part for you. Your home agrees on the split once. Then everyone pays their share before the bill is due. The app sends the reminders, so nobody has to ask a friend for money.

See how Homera works

The steps either side of this one

Keep reading

Last updated 2026-07-26.