Helpful Toolbox

Utility Bill Split Calculator

Add every shared bill, list your roommates, and instantly see what each person owes across all of them. Split evenly, or use weights for bigger rooms, part-time roommates, or couples — results update live and nothing leaves your device.

📖 How it works & FAQ

Split every shared bill fairly, in seconds

Utilities are the classic roommate argument: the electricity bill lands in one person's name, the internet in another's, and by the end of the month nobody remembers who owes whom. This calculator ends the spreadsheet shuffle. Add every shared bill — electricity, water, gas, internet, trash, streaming — and it totals them and divides the result among your roommates, either perfectly evenly or by custom weights. Everything runs in your browser: no account, no uploads, and none of your numbers leave your device.

Even splits vs. weighted splits

An even split works when everyone uses the home the same way, but weights let the math match reality. Give the roommate with the master bedroom a weight of 1.5, the one who travels half the month 0.5, and a couple sharing one room 2. The calculator converts weights into percentages of the combined total, so each person pays the same share of every bill. It also splits to the exact penny: any leftover cents are assigned to the largest fractional shares, so the individual amounts always add back to the true total. Figures are estimates only, not professional or financial advice; utility rates & fees vary.

How to use it

  1. Add a row for each shared bill and enter its name and amount.
  2. Add a row for each roommate and type their name.
  3. Leave every weight at 1 for a perfectly even split.
  4. Raise or lower weights to give anyone a bigger or smaller share.
  5. Read each person's total — results update instantly as you type.

FAQ

How do the weights work?
Each person's share equals their weight divided by the sum of all weights. Weights of 1, 1, and 2 split a bill 25% / 25% / 50%. Setting everyone to 1 is an even split.
Why is one person's amount a cent higher?
Money can't be split into fractions of a cent. The calculator hands leftover pennies to the largest fractional shares so the totals reconcile exactly — the same method banks and payroll systems use.
Can I include rent or subscriptions?
Yes. Any shared cost can be a bill row — rent, renters insurance, streaming services, or a cleaning service. The split logic is identical.
Is anything saved or sent to a server?
No. The tool is pure client-side JavaScript; refresh the page and it resets. Screenshot or note the results before closing.