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Rent Split Calculator

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Use the rent split calculator to find out how much each person should pay toward the total rent based on room size. Splitting rent between roommates is not always as simple as dividing the total amount equally. Our tool helps you find a fair contribution for each person and avoid disagreements about who should pay what.

💡 Are you wondering how much rent you can afford? Check out the rent calculator instead!

How to use the rent split calculator

Using our rent split calculator is straightforward:

  1. First, enter the total monthly rent and select the number of bedrooms (from one to three).

  2. Specify the area of each bedroom if you have two or more bedrooms. Rent is generally higher for larger rooms, so the calculator weights each share by area.

  3. Enter the number of people sharing each bedroom.

  4. Read the results, which will appear in separate sections of the rent split calculator for each room.

If you’re a landlord, you may be interested in the 3x rent calculator, which helps you apply the 3x monthly rent rule to assess if a tenant can afford the rent.

How to split rent between rooms

There are several ways to split rent between rooms. The simplest method is to divide the total rent equally between all rooms, regardless of their size. This works well when the bedrooms and other private spaces are relatively similar, but may be unfair in other cases.

Another option is to divide rent according to bedroom size. For example, if one room accounts for 60% of the total bedroom space and another for 40%, the rent can be divided using the same proportions. We believe this is one of the best ways to split rent with roommates, so we decided to use this approach in the rent split calculator.

For example, if the total rent is $2,000 and two tenants agree to split it equally, each person would pay $1,000 per month. However, what if one person has a 150 ft² room while the other only has 100 ft²? This is how to split rent in such a case:

  1. Find the total area of the bedrooms:
 ⁣ ⁣ ⁣ ⁣Total area=Bedroom 1+Bedroom 2=150 ft2+100 ft2=250 ft2\!\!\!\!\begin{split} \mathrm{Total \ area} &= \mathrm{Bedroom \ 1} + \mathrm{Bedroom \ 2} \\ &= 150 \mathrm{ \ ft}^2 + 100 \mathrm{ \ ft}^2 = 250 \mathrm{ \ ft}^2 \end{split}
  1. Find the ratio of the bedroom 1 area to the total area and multiply it by the total rent to find the cost for this room:
Rent 1=Rotal rent×Bedroom 1Total area=$2, ⁣000×150 ft2250 ft2=$1, ⁣200\begin{split} \mathrm{Rent \ 1} &= \mathrm{Rotal \ rent} \times \frac{\mathrm{Bedroom \ 1}}{\mathrm{Total \ area}} \\[1em] &= \$2,\!000 \times \frac{\mathrm{150 \ ft}^2 }{\mathrm{250 \ ft}^2 } = \$1,\!200 \end{split}
  1. Do the same for bedroom 2:
Rent 2=Rotal rent×Bedroom 2Total area=$2, ⁣000×100 ft2250 ft2=$800\begin{split} \mathrm{Rent \ 2} &= \mathrm{Rotal \ rent} \times \frac{\mathrm{Bedroom \ 2}}{\mathrm{Total \ area}} \\[1em] &= \$2,\!000 \times \frac{\mathrm{100 \ ft}^2 }{\mathrm{250 \ ft}^2 } = \$800 \end{split}

That’s it! In this scenario, the person in bedroom 1 (150 ft²) should pay $1,200, which is $400 more than the person in bedroom 2 (100 ft²), who should pay $800.

✅ In the example above, bedroom 1 is 50% larger than bedroom 2, so its rent is 50% higher too. That’s a simple case of proportion, which you can explore in the proportion calculator.

How to split rent with roommates in a single room

You now know how much each room should pay. Now let’s find out how to split rent when you live with somebody else in a single room. In this case, the equal split is the best option: simply divide the rent for a specific bedroom by the number of people living in that bedroom.

Say two people live in the 150 ft² bedroom from the example above. The calculator gives a monthly rent of $1,200 for that room, so each person pays:

 ⁣Rent per person=Rent per roomNumber of people=$1, ⁣2002=$600\!\begin{split} \mathrm{Rent \ per \ person} &= \frac{\mathrm{Rent \ per \ room}}{\mathrm{Number \ of \ people}} \\[1em] &= \frac{\$1,\!200}{2} = \$600 \end{split}

⚠️ A more customizable split may be difficult when two people share the same space, so it’s up to them to agree on one.