About FairRentSplit

A free tool that helps roommates divide rent by what each person is actually getting — room size, a private bathroom, closet space, light — instead of splitting straight down the middle.

Why "split it evenly" usually isn't fair

When a group signs a lease together, the default is to divide the rent by the number of people. It feels neutral, so most roommates never question it. But apartments are rarely made of identical rooms. One bedroom is the bright corner with its own bathroom; another is a windowless box barely big enough for a bed. Charging both occupants the same rent quietly overcharges the person in the worse room — month after month, for the length of the lease.

FairRentSplit exists to make that imbalance visible and easy to correct. Instead of arguing from gut feeling, roommates can look at the same numbers and agree on a split that reflects reality.

How the fairness math works

The calculator starts from an equal split and then adjusts each share based on the features of each room. The biggest factor is square footage — a larger private space is worth more. On top of that, the tool accounts for the things that genuinely affect day-to-day living:

• Private bathroom — not sharing is a real premium.
• Closet size — from a small reach-in to a walk-in.
• Natural light — a bright room versus one facing a wall.
• Outdoor access — a balcony, patio, or private entrance.

Each factor has a weight, and the weighted totals are normalized so the individual shares always add back up to exactly the total rent. If you and your roommates disagree about how much a particular feature is worth, the Advanced panel lets you turn each weight up or down until the split feels right to everyone.

It's private and it's instant

Everything happens in your browser. There's no account to create and nothing to install, and your numbers are never sent to us or stored. You can copy a clean summary or share a link so your roommates see the same breakdown.

Who made this

FairRentSplit is a small, independent tool built to solve one common, frustrating problem well. It's free to use and supported by unobtrusive advertising. If it helped you avoid an awkward roommate conversation, that's the point.