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About the rent split calculator
Splitting the rent evenly is easy, but it is not always fair: one room is bigger, one person has a partner living with them, one earns much more. This free rent split calculator gives three fair ways to share the rent, and the utilities too.
- By room size — each room pays for its own size, and the shared space (kitchen, living room, bathroom) is split by the number of people.
- Equally — everyone pays the same.
- By income — everyone pays the same share of what they earn.
Add a line for each room, give it a name, and set the people in the room (2 for a couple). The amounts are worked out in whole cents, so the shares always add up to the exact rent.
Features
- Three ways to split — by room size, equally or by income
- Shared space — counted in the room-size split and shared by the number of people
- Couples — set 2 people in a room; the result also shows the amount for each of them
- Utilities — split equally per person, or the same way as the rent
- Adds up to the cent — the shares always total the exact rent
- Ready to share — each line shows the rent and the utilities part; copy it into your group chat
- Square feet or square metres, any currency — saved only on this device
Three ways to split the same rent
Rent $2,400 a month and $240 of utilities. Three rooms of 180, 150 and 120 sq ft and 450 sq ft of shared space. The three people earn $60,000, $45,000 and $40,000 a year.
| Rent share | By room size | Equally | By income |
|---|---|---|---|
| Person 1 (180 sq ft, $60,000) | $880.00 | $800.00 | $993.10 |
| Person 2 (150 sq ft, $45,000) | $800.00 | $800.00 | $744.83 |
| Person 3 (120 sq ft, $40,000) | $720.00 | $800.00 | $662.07 |
The utilities, split equally, add $80 for each person.
How the room-size split works
The whole home is 180 + 150 + 120 + 450 = 900 sq ft.
- The shared space is 450 ÷ 900 = 50% of the rent: $1,200, so $400 for each of the three people.
- Each room pays for its own part: 2,400 × 180 ÷ 900 = $480, then $400 and $320.
- Total: $480 + $400 = $880, $800 and $720 — together exactly $2,400.
Leave the shared space at 0 to split the whole rent by room size: then it is $960, $800 and $640 — a much bigger gap. Counting the shared space is usually seen as fairer, because everyone uses the kitchen and the living room the same.
A couple in one room
Now Room 1 is a couple (2 people in the room). The shared space is split by 4 people: $300 each. The couple pays $300 × 2 for the shared space plus $480 for their room:
| Room | Rent | Utilities (equal per person) | Total |
|---|---|---|---|
| Room 1 — couple | $1,080.00 | $120.00 | $1,200.00 ($600 each) |
| Room 2 | $700.00 | $60.00 | $760.00 |
| Room 3 | $620.00 | $60.00 | $680.00 |
Split by income
Each person pays the same percent of their income. With $60,000, $45,000 and $40,000 ($145,000 in all), the shares are 41.4%, 31.0% and 27.6% of the rent: $993.10, $744.83 and $662.07. Type every income for the same period — all yearly or all monthly. For a couple in one room, type their two incomes together.
Frequently asked questions
What is the fairest way to split rent?
There is no single answer, which is why the calculator has three. Room size is the most common fair split when rooms differ. Equal is simple when rooms are alike. Income is often used by couples or friends who earn very different amounts. Agree on the method together.
How do I split rent by room size?
Measure each bedroom and the shared space. Each room pays its size ÷ the whole home, and the shared space is split by the number of people. The calculator does it for you — type the sizes.
Should a couple pay more?
Usually a little. They share one bedroom, but two people use the kitchen, bathroom and utilities. Set 2 people in the room: they pay one room plus two shares of the shared space.
What about a private bathroom or a balcony?
Add its size to that room's size. Then the person with the private bathroom pays for it, and the shared space is smaller.
How are utilities split?
Choose Equally per person (everyone uses about the same) or The same way as the rent. Each person in a room counts once.
Why do the amounts have odd cents?
The shares are worked out in whole cents and any spare cent goes to one person, so the total is always exactly the rent. $1,000 split three ways is $333.34 + $333.33 + $333.33.
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- 50/30/20 Budget Calculator — fit your rent into a budget
- Electricity Cost Calculator — what your devices cost to run
- Tip Calculator — split a restaurant bill
How to use it
- Choose By room size, Equally or By income
- Type the rent per month and the utilities if you share them
- For room size, type the shared space and choose square feet or square metres
- Type each room's name and room size (or income), and the people in the room
- Press Add a room for more roommates
- Choose how to split the utilities
- Read each share in the result, then press Copy the result to send it to your roommates
