Rent Split Calculator
Split rent fairly by equal shares, room size, or income.
Rent Breakdown
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This calculator offers three methods for dividing rent among roommates. Choose the method that fits your situation best:
- Equal Split. Enter the total monthly rent and the number of roommates. Everyone pays the same amount. This is the simplest option when all rooms are roughly equal in size and amenities.
- By Room Size. Enter the total rent and each room's square footage. The calculator divides rent proportionally so larger rooms pay more. This is the fairest method when rooms differ in size.
- By Income. Enter the total rent and each person's monthly income. The calculator divides rent proportionally by income, so higher earners pay a larger share. This works well when roommates have significantly different incomes.
Results update instantly as you type. Use the Add Room or Add Person buttons to add more roommates. The breakdown table shows every person's share, dollar amount, and percentage.
About Rent Splitting
Splitting rent fairly is one of the most common sources of tension among roommates. The equal split works when rooms are similar, but it often feels unfair when one person has a master bedroom with an attached bathroom while another has a small room next to the kitchen. Splitting by room size uses square footage as an objective measurement, removing the guesswork. Splitting by income is a collaborative approach where each person contributes according to their ability to pay.
Whichever method you choose, discuss it openly before signing a lease. Use the Share button to send your calculation to roommates so everyone can see the breakdown. All calculations run in your browser. No data is stored or sent to any server.
Frequently Asked Questions
What is the fairest way to split rent?
The fairest method depends on your situation. If all rooms are similar in size and amenities, an equal split is simplest. If rooms differ significantly, splitting by square footage gives each person a share proportional to the space they occupy. If roommates have very different incomes, splitting by income ensures no one is overburdened. Many roommates combine methods, using room size as the base and making small adjustments for other factors like natural light or closet space.
How does the room size method work?
The room size method divides rent based on each room's square footage as a proportion of the total. For example, if the total rent is $2,400 and three rooms measure 150, 120, and 100 sqft (370 total), Room 1 pays (150/370) x $2,400 = $973, Room 2 pays (120/370) x $2,400 = $778, and Room 3 pays (100/370) x $2,400 = $649. Larger rooms cost more, which most people consider fair.
How does the income-based method work?
The income-based method divides rent proportionally by each person's monthly income. If Person A earns $5,000 and Person B earns $3,000 with total rent of $2,400, the combined income is $8,000. Person A pays (5,000/8,000) x $2,400 = $1,500, and Person B pays (3,000/8,000) x $2,400 = $900. This approach ensures each roommate spends the same percentage of their income on rent.
Should utilities be split the same way as rent?
Utilities are typically split equally since everyone uses shared resources like heating, water, and internet roughly the same amount. However, some roommates choose to split utilities the same way they split rent for simplicity. If one person works from home and uses significantly more electricity or internet, it may be worth adjusting their share. The key is agreeing on a method before moving in together.