What's the fairest way to split rent?

It depends on the apartment. If rooms are identical in size and amenities, equal splits are perfectly fair. If rooms differ, splitting by room size is more defensible. If there's a big income gap between roommates, income-based splitting prevents one person from being stretched thin.

Should rent include utilities?

It's cleaner to split rent and utilities separately. Rent stays constant, so it makes sense to lock in those shares. Utilities fluctuate month to month, so splitting them separately means the base rent agreement doesn't need to change.

What if one roommate uses more space?

Use the By room size option. Enter the square footage of each bedroom and the calculator does the proportional math. Common areas are shared equally, so only private room sizes factor in.

Can I save the calculation and share it?

Yes. The Copy link button creates a URL with all your inputs pre-filled. Share it with your roommates before you sign the lease so everyone agrees on the split up front.

Rent Calculator: Split Rent Fairly Between Roommates

Most roommate conflicts start with money, and rent is the biggest line item. Getting the split method right before you move in prevents resentment later. This calculator handles three common approaches so you can pick the one that fits your situation and share it with everyone before signing anything.

Monthly rent

Number of roommates

Split method

How it works

1
Enter the monthly rent
Type the total rent amount your group pays. Include only rent here; utilities can be split separately.
2
Choose how to split it
Equal works when rooms are the same size. By room size is fairer when rooms differ. By income is fairest when budgets differ significantly.
3
See each roommate's share
The calculator shows exactly what each person owes per month so there's no room for debate.

Related tools

Bill Splitter: split any one-time bill equally or by custom amounts
Income Split Calculator: split any shared cost proportionally by income

Common questions

Keep your circle. Split the bills.

Free on iOS and Android. No daily limits, no ads. Your friends don't need an account.

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Also available on web