Rent Split Calculator

Split rent and utilities among roommates.

Monthly rent

Monthly utilities(optional)

Number of roommates

people

Results update as you type.

Each person pays

—

Total monthly cost—

How it works

Sharing a home means splitting the rent and bills fairly, and this calculator finds each roommate's share. You enter the monthly rent, the monthly utilities, and the number of roommates, and it returns what each person pays and the total monthly cost. The simplest and most common approach is an even split — total cost divided equally among everyone — which this calculator computes. Including utilities (electricity, water, internet, gas) in the split matters because they can add substantially to the true monthly cost of living together. While an equal split is fair when rooms and incomes are similar, roommates often adjust for differences: someone with the larger bedroom or a private bathroom might pay more, or shares might be weighted by income so the split feels proportional. To handle those cases, you can divide costs by room size (square footage) or agree on custom percentages, then compare against this equal-split baseline. Agreeing on how to split before moving in, and putting it in writing, prevents conflict later. Remember to also plan for shared one-time costs like the security deposit and furniture, and to decide how bills are paid and reimbursed each month. This calculator gives a clear, fair starting point. Enter the rent, utilities, and number of roommates to find each share.

Formula

Per person = (rent + utilities) ÷ number of roommates

The total monthly cost is the rent plus utilities, and dividing it by the number of roommates gives each person's equal share. This assumes an even split; unequal splits based on room size or income would weight each person's share differently.

Source:Cost-sharing arithmetic

We review all our tools from time to time to ensure accuracy.

Worked example

Monthly rent:1800Monthly utilities:300Number of roommates:3

($1,800 + $300) ÷ 3 = $700 per person per month.

How to use this calculator

1
Enter your values
Enter monthly rent and number of roommates.
2
Adjust the options
Adjust monthly utilities if they apply — sensible defaults are already set.
3
Read your result
Each person pays updates instantly as you type — no button to press.

Frequently asked questions

How do you split rent between roommates?

The simplest way is an even split: add the rent and utilities, then divide by the number of roommates. For $1,800 rent plus $300 utilities among three people, each pays $700. Roommates often adjust for differences in room size or income, but equal division is the common, fair default this calculator computes.

Should rent be split by room size?

It can be, especially when bedrooms differ significantly. A common method divides rent by each room's square footage, so the person with the larger room pays proportionally more, while shared spaces are split equally. This feels fairer when rooms are unequal. Agree on the method with all roommates before moving in to avoid disputes.

Should we include utilities in the split?

Yes, including utilities gives the true cost of living together. Electricity, water, gas, internet, and trash can add a few hundred dollars a month. You can split them equally with the rent, or track and divide variable bills like electricity separately. Including them in the calculation ensures no one is surprised by the real monthly total.

How do we split rent fairly by income?

Some roommates split proportionally to income so the burden feels equal relative to what each earns. Add everyone's incomes, find each person's share of the total, and apply that percentage to the rent. This helps when incomes differ widely, though many roommates prefer a simple equal or room-size split. Choose the method everyone agrees is fair.

What else should roommates budget for?

Beyond monthly rent and utilities, plan for the security deposit (often one month's rent), the first and last month up front, shared furniture and household supplies, and a system for reimbursing whoever pays each bill. Agreeing on these and putting the arrangement in writing prevents misunderstandings and makes shared living run smoothly.