Rent Split Calculator by Square Footage

How the rent split calculator by square footage works

One common way to calculate this is to divide each bedroom's square footage by the total private bedroom square footage, then multiply that share by the total rent.

Formula: room rent = total rent x room square footage / total private bedroom square footage.

This keeps the default method narrow and explainable. Shared living rooms, kitchens, bathrooms, hallways, and utilities are not counted unless your group agrees to use a separate common-space rule.

Use this page for a clean square-footage formula. If the larger room is also the master bedroom with extra features, use the master bedroom page. If there are several different rooms, use the uneven rooms calculator. If you need a general starting point before choosing a method, use the main rent split calculator.

When square footage is a good fit

A square-footage split is useful when bedrooms are clearly different sizes and room size is the main difference roommates want to count.

If one room also has a private bath, parking, much better storage, more privacy, more noise, or an awkward layout, keep those assumptions visible as separate premiums or discounts instead of hiding them in the square-footage number.

What assumptions this method makes

The method assumes private bedroom area is the best starting point for dividing rent between rooms. It does not say that the result is the only fair answer.

If two people share one bedroom, the room-size split can still handle the bedroom portion. You can enable common spaces if part of the rent should also reflect how many people use shared areas.