Data & CSV

CSV running total

Append a cumulative numeric total in the table’s current order.

CSV running total
Esc to restore

Your inputs

UTF-8 CSV/TSV stays on this device. First row contains unique headings; maximum 25 MB, 50,000 rows and 200 columns. Fully empty rows are ignored.

Up to 25 MB per file, 50,000 data rows, 200 columns and 2 million data cells. Fully blank rows and columns are ignored before row, column and cell limits are checked. Individual tools may have smaller result or chart limits.

Results update as you type. Larger files run when you press Update result.

Processed on your device

Your result

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Your result will appear here.

Your inputs stay in this browser. Nothing is uploaded or saved.

A clear answer. Here’s how.

Computes a cumulative sum in the existing row order, using compensated arithmetic to reduce cancellation error. Blank values add zero; non-numeric non-blank values are rejected. No sorting, date interpretation or group resets are performed. Original cell strings remain unchanged.

See a worked example

Worked example

A fixed demonstration, separate from the values you enter above.

Your CSV data
ID,Name,Department,Amount,Date
001,Ada,Design,120,2026-01-05
002,Sam,Writing,80,2026-01-06
003,Jo,Design,150,2026-01-07
004,Lee,Writing,,2026-01-08
005,Alex,Design,60,2026-01-09
Column separator
Comma
Numeric column
Amount
New running-total heading
Running total

Example result

Example result
IDNameDepartmentAmountDateRunning total
001AdaDesign1202026-01-05120
002SamWriting802026-01-06200
003JoDesign1502026-01-07350
004LeeWriting2026-01-08350
005AlexDesign602026-01-09410

Keep going.

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