Rent split calculator for roommates
Enter your total rent and each bedroom's size to get a fair split in seconds. Choose an equal split, a split by bedroom size, or the hybrid method most roommates find fairest.
How the calculation works
Hybrid method: each person pays (rent × shared %) ÷ number of roommates plus (rent × (100% − shared %)) × their room weight ÷ total room weight. A room's weight is its size, increased by the private bathroom premium if it has one.
By bedroom size: the same as hybrid with a 0% shared share. Equal: rent ÷ number of roommates. Amounts are rounded to the cent and always add up to the full rent.
Want the reasoning behind each method and a worked example? Read how to split rent fairly with roommates.
Frequently asked questions
How does this rent split calculator work?
With the hybrid method, the shared-space percentage of the rent is split equally between everyone, and the rest is split in proportion to bedroom size. Rooms with a private bathroom get their size weight increased by the bathroom premium you choose.
What shared-space percentage should we use?
Between 40% and 60% is typical. Use a higher percentage if the kitchen and living room are large and everyone uses them a lot, and a lower one if bedrooms make up most of the apartment.
Can I use square meters instead of square feet?
Yes. The calculator only uses the ratio between room sizes, so any unit works as long as you use the same one for every room.