RoomRatio

Split rent fairly when a couple shares a room

A couple sharing one room is not the same as three separate bedrooms. Compare the private-room share with the common-space share before anyone settles on one-third each.

No signupTransparent formulaExact cent rounding
$

How do you want to split it?

Most shared rentals start with room — but income, custom %, or equal work too.

People3
Rooms
Shared
Size
Window & light
View
Sound
Door
Size
Window & light
View
Sound
Door
Shared space

Kitchen, living room, pool… — paid for by everyone, so it's split equally.

Each person paysTotal $2,400.00

By room · weighted by size & amenities, shared space split equally

Example — edit any value
Alex
25%−$200.00 vs equal
$600.00
Taylor
25%−$200.00 vs equal
$600.00
Jordan
50%+$400.00 vs equal
$1,200.00
Compared with 50/50
This method shifts $400.00/month between shares.
$4,800.00 over 12 months.
Alex−$200.00 vs equal
Taylor−$200.00 vs equal
Jordan+$400.00 vs equal
Would everyone in the household choose the same method?
Room breakdown
Shared bedroom · Alex, Taylor1.00 weight$1,200.00
Single bedroom · Jordan1.00 weight$1,200.00
This is a rent split summary, not legal advice.
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How this was calculated
  • Shared bedroom: weight 1.00, shared by 2
  • Single bedroom: weight 1.00
  • Room weights come from size and amenities; you can adjust them.

No signup needed. Nothing is stored until you choose to share.

How to model a couple and one roommate

Assign both partners to their shared bedroom and the other roommate to the second bedroom. The shared bedroom's private portion is divided between the couple, while common space is divided among all three people.

Formula
person's private-room share + equal share of common-space rent

Example: two equal bedrooms, one shared by a couple

With $2,400 rent and no separate common-space allocation, two equally weighted bedrooms receive $1,200 each. The couple pays $600 per person for its shared room, and the solo roommate pays $1,200. The three amounts total $2,400.

Assumptions to review

  • The couple is treated as two people for common space and as co-occupants of one bedroom.
  • Room weights can change when bedrooms differ in size or amenities.
  • Income or a manual percentage may be more acceptable if the household rejects room-based math.

Frequently asked questions

Should a couple always pay two-thirds?

Not necessarily. Two-thirds treats every person equally but ignores that the couple shares one private room. Compare both approaches before agreeing.

What if the couple has the larger bedroom?

Increase that room's area or quality inputs. Its private share rises, then the calculator divides that room share between the two occupants.