gizmobench

Rent Split Calculator

Type the rent once, add a row per person, and pick the policy: an even split, by bedroom size, by income, or by any weight your group agreed on. What this page does differently is show its arithmetic and then prove it adds up. $2,400 across rooms of 140, 120 and 100 square feet comes to $933.33, $800.00 and $666.67, with the formula it used, $2,400.00 x room size / 360 sq ft, printed under the table and a line of working beside every individual share. When the rent will not divide cleanly the leftover cents are handed out one at a time rather than rounded away, so three people splitting $1,000 pay $333.34, $333.33 and $333.33, which comes to $1,000.00 and not $999.99. A shared-space option takes 20, 30 or 50 percent of the rent off the top, splits that part evenly between everyone and divides only the rest by room size, for the flat where the common space is the point. It all runs in your browser, and Copy hands you the table, the formula and the line that reconciles them.

Rent $2,400.00By room size3 people
rent    $2,400.00
basis   room size

Ava   140 sq ft   38.9%     $933.33
Ben   120 sq ft   33.3%     $800.00
Cal   100 sq ft   27.8%     $666.67
                          ---------
                          $2,400.00
Rent
Basis
People
3
Rounded
To the cent

Each share = $2,400.00 x room size / 360 sq ft. The 3 shares add to $2,400.00, the rent exactly: the leftover cent went to Cal.

A shared portion splits evenly between everyone first, and the rest divides by room size.
$933.33

$2,400.00 x 140 / 360 = $933.33

$800.00

$2,400.00 x 120 / 360 = $800.00

$666.67

$2,400.00 x 100 / 360 = $666.67, one leftover cent included

Between 2 and 20 people, named or not.
  • Even split, 3 people$2,400
    $800.00 each
  • By room size140/120/100 sq ft
    $933.33 / $800.00 / $666.67, adding to $2,400.00 exactly
  • Remainder cent$100 / 3
    $33.34 / $33.33 / $33.33, adding to $100.00 exactly
Where the odd cent goes. Three people and $1,000 is $333.3333 each, which is not a payable number, so every share is floored to the cent and the cents left over are handed out one at a time, largest fraction first and the earliest name on a tie. That gives $333.34, $333.33 and $333.33: one person pays a cent more, and the three shares add to $1,000.00 rather than to $999.99. The table names whoever took a leftover cent, so you can hand it to someone else next month.

Common questions

How do you split rent by room size?
Choose Room size, put each private room's area in its row, and the rent divides in proportion to those areas. With $2,400 and rooms of 140, 120 and 100 square feet the total is 360 square feet, so the shares are $933.33, $800.00 and $666.67. The formula it used, $2,400.00 x room size / 360 sq ft, is printed under the table, and each row carries its own line of arithmetic, such as $2,400.00 x 140 / 360 = $933.33.
What happens to the cent that will not divide?
$1,000 between three people is $333.3333 each, which nobody can pay. Every share is floored to the cent, then the cents left over are handed out one at a time, largest fraction first and the earlier name on a tie. One person pays $333.34, the other two pay $333.33, and the three shares add to $1,000.00 rather than $999.99. The line under the table names whoever took a leftover cent, so next month it can go to someone else.
How is shared space counted?
By a setting you control, not by a rule this page picked for you. Left at All by room size, the whole rent divides in proportion to the private rooms. Set 20, 30 or 50 percent and that slice comes off the top, splits evenly between everyone, and only the rest divides by room size. At 30 percent the same $2,400 and the same three rooms come to $893.33, $800.00 and $706.67, because $720 of the rent is now shared equally.
Can it split by income instead of room size?
Yes. Income divides the rent in proportion to what each person earns, so $3,000 between incomes of $4,000 and $2,000 is $2,000 and $1,000. Custom weight does the same with any numbers you like, whether that is nights in the flat each week or a ratio the group settled on, and it accepts up to six decimal places. Even ignores the value column altogether: $2,400 between three people is $800.00 each.
How many people can it split between, and do they need names?
Between 2 and 20 people, added or removed a row at a time. Names are optional: an empty name box prints as Person 1, Person 2 and so on, in the table and in any message about that row. Rent up to $100,000,000 is accepted, as are commas, a dollar sign and two decimal places, and anything it cannot read is refused with a message naming the row and the problem rather than dropped from the total.
Does it handle a part month or different move-in dates?
No, and it says so rather than guessing. This page divides one rent amount between people who are all there for the same period. For a part month, work out the amount owed for those days first and enter that as the rent. Splitting by days would need move-in dates the page never asks for, and utilities are not included either: add them to the rent yourself, or split them as a second sum.
Does anything I type leave my browser?
No. The arithmetic runs on your own device, nothing is uploaded and there is no account. The only thing kept is your last entry, saved in this browser under a single key so the page opens where you left it, and Start over at the top of the page forgets it.

Exact arithmetic on the rent and shares you enter, and the shares always add back to the total: the odd remaining cents are handed out one at a time rather than rounded away. It is arithmetic, not tenancy advice.