The Splitty bill split calculator
Put in the total, say how many people are sharing it, and this page tells you what each person owes. Use the weighted mode when the shares are not equal, for example splitting rent where one bedroom is bigger than the other, or a dinner where two people shared a set menu and one did not.
Result
| Person | Owes |
|---|---|
| Person 1 | 30.00 |
| Person 2 | 30.00 |
| Person 3 | 30.00 |
| Person 4 | 30.00 |
| Total | 120.00 |
How to split rent when the rooms are different sizes
Splitting rent down the middle is fair only when the rooms are the same. The usual fix is to weight each person's share by the floor area of their bedroom, then divide the shared space, the kitchen, living room and bathroom, equally on top. Two ways to do that with this page:
- Room area only. Switch to weighted mode and enter each bedroom's area in square metres as that person's shares. Quick, and it slightly over-charges whoever has the larger room, because they do not use more of the kitchen.
- Split the rent in two passes. Decide what portion of the flat is private bedroom space and what portion is shared. Run the shared portion through this page evenly, run the private portion through it weighted by room area, and add each person's two numbers together.
Whichever you pick, write it down and agree it before the first month, not after. Almost every rent argument between flatmates is about a rule nobody wrote down, not about the money.
Splitting a restaurant bill
If everybody ate roughly the same, split evenly and stop. It is faster, and the person who worries about being fifty baisa short is usually the one who ordered the extra drink. If one person had significantly more, or somebody is not drinking, use weighted mode: give the lighter eaters 1 share and the heavier ones 2, or enter each person's own subtotal as their weight and let the tip and service charge divide in the same proportion. That is what the tip field above does, it adds the percentage before splitting, so the person who ordered more also pays more of the service.
When a calculator is not enough
A one-off bill is a calculation. A trip, a flatshare or a family fund is a running record: people pay at different times, in different amounts, sometimes in different currencies, and the question stops being "what is my share" and becomes "after everything, who owes whom". That is what Splitty does. It is free, it works in the browser without an account for the people you invite, and it settles the group in as few payments as it can rather than one payment per pair of people.
For a holiday with several payers, use the trip cost splitter on this site. For the flatshare version of this question, read splitting expenses with roommates.