Roommate toolkitRoomieTools

Rent split calculator

Quick explanationChoose shared areas by occupancy with bedrooms by adjusted size, or allocate all rent by adjusted bedroom size. Agree on feature adjustments together.

Step 1: Total rent

Split method

Step 2: Room details

See 4 examples
Example
Example 1

Shared areas by occupancy · family in one room

Monthly rent 6000, shared area 30 m². Room 1: 20 m², private bathroom, two adults. Room 2: 12 m², south-facing, one adult. Room 3: 9 m², one adult and one child under 1.2 m.
Results:Room 1 $2926.66 · Room 2 $1553.32 · Room 3 $1520.02
Example
Example 2

Bedroom area · private bathroom and south-facing

Allocate all rent by bedroom area. Monthly rent 6000. Room 1: 20 m² with private bathroom (+20%); room 2: 12 m² south-facing (+10%); room 3: 9 m² without adjustments.
Results:Room 1 $3116.89 · Room 2 $1714.28 · Room 3 $1168.83
Example
Example 3

Private bathroom adjusted to +15%

Use the same rooms, but reduce the private bathroom premium from 20% to 15% using the minus control five times.
Results:Room 1 $3053.10 · Room 2 $1752.21 · Room 3 $1194.69
Example
Example 4

Windowless and partitioned rooms

Monthly rent 5000. Room 1: 18 m² with private balcony, south-facing. Room 2: 15 m². Room 3: 10 m², windowless and partitioned.
Results:Room 1 $2498.86 · Room 2 $1720.97 · Room 3 $780.17

Frequently asked questions

What is a fair way to split rent?

Use adjusted bedroom area when rooms have similar occupancy. Use shared areas by headcount when occupancy differs. Agree on feature adjustments and record your decision.

How are shared areas allocated?

Enter the total shared area. Its rent is total rent times shared area divided by total floor area, split by occupancy; children under 1.2 m count as half. All-by-bedroom allocates the full rent by adjusted bedroom size.

How is rent split when people share a bedroom?

With shared areas by headcount, enter adults and children in each room. More occupants pay more for shared areas. All-by-bedroom ignores occupancy; agree on the split within each room.

What are base rent and feature adjustment?

Base rent is total rent times the room’s share of bedroom area. Feature adjustment is the difference after applying room features. The final total is the room’s monthly rent; all room totals match the full rent.

How much more should the main bedroom cost?

There is no fixed ratio. Enter room sizes and features to get a starting point for discussion.

Can I change feature adjustments?

Yes. Use minus and plus to change a selected feature by one percentage point. Agree on the adjustment together. Orientation only adds a south-facing premium to avoid double counting.

How many rooms can I use?

Use 2–6 rooms. Add a room with the button, or remove one using its delete control.

Web app

Shared Expense Ledger

How can we manage shared costs each month?
For two roommates or a couple, Shared Expense Ledger keeps mutually confirmed expenses and calculates the settlement balance.

✓✓ Both people approve🔒 Original records stay intact⚡ Settle the balance