This split bill calculator is designed for group dinners, team outings, club activities, and any social gathering where expenses need to be divided fairly across complex participation patterns. It handles multi-round events (dinner → bar → cafe) where different people attend different rounds, participants who leave early or join late, and scenarios where multiple people paid different portions. A graph-theory-based minimal transfer algorithm consolidates tangled peer-to-peer debts into the fewest possible bank transfers, so settling a 10-person gathering typically requires only 3–4 money transfers instead of 10+. Optional 10-KRW/100-KRW rounding and one-click Kakao-friendly summary text generation streamline the entire process. Applicable to office dinners, wedding gift settlements, group travel expenses, housewarming parties, and any communal spending situation. All calculations run entirely in your browser—no data is transmitted to any server, ensuring complete privacy for your financial details.