Shared-expense settlement
Reconcile group expenses and unequal shares, then see who pays whom. Change the inputs to update the chart or diagram.
Your inputs
These editable values illustrate the calculation. Replace them with your own inputs. Results update as you edit.
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How it works
- Allocated share = Σ ( × / Σ); Balance (+ receives, − pays) = Paid − Allocated share
- Worked example: A = 90, B = 30, C = 0; w = (1;1;1) ⇒ Allocated share = (40;40;40); B → A: 10; C → A: 40
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Use one currency, 2–20 uniquely named participants and up to 50 expenses. Payer numbers follow participant row order. Blank expense weights use participant defaults; otherwise enter one weight per participant using semicolons and decimal points. Zero excludes a participant from that expense. Each expense uses largest-remainder allocation in currency minor units, with ties resolved by row order. Positive balances receive money. Transfers are deterministic, without a claim of the fewest possible transfers.
Sources
- OpenStax — proportions Sources reviewed: 2026-10-08
