Calc4Living

Personal Finance & Budget · Free calculator

Expense Split Calculator

Allocate an expense equally or by custom percentages, with whole-cent amounts that exactly reconcile to the total.

Your inputs

Prefilled values are editable examples. Enter your own amounts. All fields are required unless marked optional. Results clear whenever an input or name changes.

Labels only; no exchange rates or conversion. Use one currency for all amounts.

Custom shares must total 100%, with at most six decimal places per share.

Enter your own amount in the selected currency.

Up to 100 participants. Review custom percentages after changing the participant count.

Your calculation

Results

Review the assumptions, enter your values and calculate.

How do I split an expense equally or by custom percentages?

Convert the original total to whole cents. Equal shares divide cents by participant count; custom shares multiply cents by each percentage. Floor each exact quota, then allocate remaining cents by largest fractional remainder. Ties go to the earlier participant.

Worked example

Splitting 10.00 equally among three participants allocates 3.34, 3.33 and 3.33, totaling exactly 10.00. Splitting by 50%, 30% and 20% allocates 5.00, 3.00 and 2.00.

Assumptions & limitations

  • All five supported currencies use two decimal places. Enter a total with at most two decimal places; fractional-cent totals are rejected instead of silently changed. Allocations reconcile exactly in cents; displayed decimal sums can have normal binary floating-point noise in other software.
  • Supports 1–100 participants. Custom percentages must total 100% and have at most six decimal places. A zero share receives no cents. Largest-remainder rounding can make realized percentages differ slightly from requested shares.
  • Names are editable labels; no payment, transfer, account or currency conversion is performed.