What this calculator does
Enter your income and expenses. The calculator generates a Sankey diagram showing the flow from income to each spending category.
The math
Total income = entered income. Each expense = entered amount. Remainder = income − total expenses.
Worked example
With $4,000 income and $2,700 in expenses, the diagram shows $1,300 remaining and how each expense slice compares to income.
Why this matters
Money is abstract until you see it as time, objects, or a lifetime total. This visualizer turns a number into something you can feel.
Methodology and transparency
This page publishes the exact formula used to compute the result, so you can verify it in a spreadsheet or check the assumptions against your own situation. The worked example uses the tool default inputs; change any number and the result updates live in your browser. No data is sent or stored.
Common questions
What is a Sankey diagram?
A flow chart where the width of each arrow is proportional to the amount of money flowing.
Can I edit the expenses?
Yes. Enter expenses one per line or comma-separated in the format name $amount.
What if expenses exceed income?
The diagram will still render, but the remaining flow will be negative, visually flagging the deficit.