Event expense split calculator
Split an event’s already paid expenses and calculate which group should reimburse another. Use equal shares or weights agreed together. An explicit rounding rule assigns cents so that shares add up to the exact total. This free calculator works without accounts or names, keeps the figures in your browser, and produces a report you can save.
Who reimburses whom
How to use it
Add up what each group advanced and enter each amount once. Exclude deposits already refunded. Use a common currency and agree on weights first: 1, 1, 1 splits equally; 2, 1, 1 assigns half to the first group. Zero weight excludes a group from the shared cost while preserving repayment of its advance. Add or remove groups, then keep the CSV or printed report.
Method and example
Amounts are converted to integer cents. Exact share = total × weight ÷ sum of weights. Whole cents are assigned first; leftover cents go to the largest remainders, with lower group numbers breaking ties. Balance = paid − assigned share. Positive balances receive, negative balances pay. Settlement follows group order until all balances reach zero; it does not claim the absolute minimum number of transfers. Example: payments of 120, 30, and 0 total 150. With weights 1, 1, 1, each owes 50: group 2 pays 20 to group 1 and group 3 pays 50 to group 1. Splitting 0.01 between three yields shares of 0.01, 0, and 0.
Limits and privacy
This does not move money, connect banks, or verify receipts. Weights are the group’s choice rather than financial advice. One allocation applies to the whole total; calculate separate batches for expense-specific exceptions. Taxes, tips, exchange rates, and fees are excluded. MXN, EUR, and USD merely label two-decimal amounts: convert them beforehand. Do not enter names, account numbers, or personal data. Figures are neither stored nor transmitted; groups use numbers only. Removing the last group also removes its advance from the total: review before exporting. CSV adds no links. This blog tool is not a feature of the Convite app.
Frequently asked questions
Can weights differ?
Yes. Integer weights 2, 1, and 1 correspond to shares of 50%, 25%, and 25%.
Does zero weight lose an advance?
No. The group takes no share of the total but keeps its advance as a receivable balance.
Why is there a one-cent difference?
Money cannot split into fractions of a cent. Largest remainders preserve the total, with group numbers breaking ties.
Can currencies be mixed?
No. Convert all advances to a common currency first. The selector does not convert values.
Are payments made here?
No. The result is a settlement suggestion to review, without payment processing or a stored history.