About RoomieTools

RoomieTools is a free toolbox for people who share a rented home. It is for roommates, couples, and small households who want a clear way to split rent and utility bills, rotate chores, write house rules, record the condition of the place, and compare habits before move-in day.

The calculators and templates need no account. Shared Expense Ledger is a separate, free book for two people: both approve each expense, then one transfer settles the balance. RoomieTools is the name on this English site, en.aahezu.com. It is not affiliated with hotel software that uses a similar name.

Who it is for

Use it when the rooms are not identical, when someone moves in or out mid-bill, or when you would rather point at a written split than renegotiate it in the group chat. The pages are written for readers in the United States. Money examples are in dollars. Room sizes are entered in square meters because that is the unit the form calculates with, and each page says so.

How fair splitting works

There is no single fair number. The tools make two common methods explicit, show the arithmetic, and let you change the feature weights. Equal shares are a good fit when the rooms and the households are similar. They are a poor fit when one room has a private bathroom and another has no window.

Rent

Method one splits the whole rent by adjusted bedroom size. A private bathroom counts the room at 120% of its floor area, a private balcony or a south-facing window at 110%, a room with no window at 80%, and a partition at 85%. Each of those defaults can be edited by one percentage point. A child does not change this method. The people who share a bedroom divide that bedroom’s line themselves.

Method two pulls the shared square meters out first. Shared-area rent equals total rent times shared area divided by the whole apartment. That piece is split by people, and a child under 1.2 meters counts as half a person. The remaining rent is split by the same adjusted bedroom sizes.

Shares are calculated in cents. Any leftover cent is added to the largest shares so the lines add up to the rent you typed. On a $2,400.00 example with a 20 m² private-bath room, a 12 m² south-facing room, and a 9 m² room, the bedroom-size method comes out to $1,246.76, $685.71, and $467.53. The rent split calculator shows both methods with the full table.

Utility bills

Each adult is one share per day they lived in the home during the billing period. A child under 1.2 meters is half a share per day. Count move-in day and do not count move-out day. Extra electric heat can be split by the hours it ran, with the rest of the bill still split by occupant-days. See the utility bill splitter for a $180.00 example that comes out even.

Chores, rules, and the checklist

The chore chart builds a month on daily rotation (odd and even dates, or one person per day in order), weekly rotation, or a fixed owner per area. The house rules page prints six sections: fixed costs, daily habits, shared expenses, moving out, how you will change a rule, and a move-in inventory. The move-in checklist is the same inventory with meter readings and keys, filled on move-in day and compared on move-out day. The habits quiz is twelve questions and a link. It does not store answers.

What stays on your device

Rent and utility numbers are calculated in the browser and are not saved by the site. The chore chart, house rules, and checklist keep a draft in local storage on that device so you can return to it. Clearing the browser data clears the draft. The quiz puts the answers in the share link. Feedback you choose to send, and the Shared Expense Ledger account, are the pieces that reach the server. Details are on the privacy page.

Who operates the site

RoomieTools is an independent project run by an individual, not a company. There is no separate company name and no published postal address. Email hello@aahezu.com. Questions about a calculation can also go through the feedback form on any tool page. That form is optional.