Splitting & Planning

Bill Splitter Calculator

Split bills by equal or custom shares, then see balances, settlement suggestions, PDF export, and a shareable URL.

Participants

Use custom split weights

Expenses

Total expenses

£96.00

People

Suggested settlements

Balances

Alex

£64.00

Sam

-£32.00

Taylor

-£32.00

Settlement optimisation

Sam pays Alex £32.00
Taylor pays Alex £32.00

What this tool includes

Add participants
Add expenses
Equal split
Custom split
Show balances
Settlement optimisation
Export PDF
Shareable URL support

How this works

The bill splitter compares what each person should pay with what they have already paid. In an equal split, the bill total is divided by the number of people. In a custom split, each person's share is based on the weights or shares you enter, so someone who ordered more, drank more, or agreed to cover a larger part of the bill can be assigned a larger share.

Rounding is handled to the nearest penny. If the total does not divide perfectly, the calculator keeps the final penny difference inside the balance calculation so the suggested repayments still add back to the bill total. In practice, the person whose rounded balance is closest to the remaining penny absorbs that tiny adjustment. If someone paid more upfront than their share, they are owed money. If someone paid less than their share, they owe money. The settlement suggestions then reduce those balances into the fewest practical transfers.

Assumptions behind this estimate

Assumes each listed expense is shared by the chosen participants.
Custom split weights are proportions, not fixed amounts.
Does not connect to bank payments or store account data.

Worked examples

Uneven restaurant bill split three ways

A restaurant bill is GBP96. Alice and Ben each had food worth GBP28, while Chloe had food worth GBP28 plus an extra GBP12 round of drinks.
The fair shares are Alice GBP28, Ben GBP28 and Chloe GBP40. If Alice paid the full GBP96 on her card, Alice has paid GBP68 more than her own share.
The settlement is Ben pays Alice GBP28 and Chloe pays Alice GBP40. Everyone ends with the right final cost, even though one person paid at the till.

Equal dinner split with one payer

Four friends share an GBP85 dinner equally, so each person's share is GBP21.25.
If Priya pays the whole bill, Priya has paid GBP63.75 more than her share.
The other three each repay Priya GBP21.25. The total repayments equal GBP63.75 and the bill is fully balanced.

Odd penny split

A GBP50 bill split between three people is GBP16.666..., which cannot be paid exactly in pounds and pence.
The calculator rounds shares to penny values while preserving the total bill amount.
Two people may show GBP16.67 and one may show GBP16.66, so the final penny is handled transparently rather than disappearing.

FAQ

How do you split a bill fairly with different amounts?

Use a custom split where each person is assigned the amount, percentage or weight that reflects what they actually used. The calculator then compares those shares with who paid upfront.

What happens if the total does not divide evenly?

The result is rounded to the nearest penny and the remaining penny is assigned inside the balance calculation so the shares still add up to the original bill.

Can one person pay and everyone else settle later?

Yes. Enter the full expense against the person who paid, then include everyone who should contribute. The settlement list shows who should repay that payer.

Is it better to split equally or itemise?

Equal splits are fastest when everyone ordered roughly the same. Itemised or custom splits are fairer when one person had extras, skipped a course, or agreed to pay a different share.

Written and maintained by AtlasPeak, a UK-focused calculator site that explains the assumptions behind each result. Last updated: July 2026.

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