Sum CSV Columns
Find the sum of CSV columns. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Sum CSV Columns
- 1. Paste your CSV. Drop the comma-separated rows into the input pane. Every column containing numeric values gets totaled independently down its full length.
- 2. Confirm the header row. Leave First row is header checked so the column names are used to label each total instead of being treated as a value to add.
- 3. Read the totals. The result lists each numeric column alongside its sum. Columns with non-numeric values, like names, are skipped automatically and don't appear in the totals list.
When to use Sum CSV Columns
Sum CSV Columns adds up every numeric column in a CSV file and reports each total, without opening a spreadsheet to write a SUM formula. It's a fast way to get column totals from an exported table.
- Totaling expenses from a bookkeeping export. You export transactions from an accounting tool as CSV and want a quick total of the amount column before entering it into a report, without loading a spreadsheet.
- Checking a total against an invoice. A CSV of line items should sum to a specific invoice total. Summing the price column instantly confirms whether the export matches what was billed.
- Aggregating survey scores. A CSV export of survey responses has several numeric rating columns. Summing them gives a quick per-question total before deeper statistical analysis.
Examples
Total each numeric column
Input
item,price apple,2.5 pear,3
Output
price: 5.5
About the Sum CSV Columns tool
Sum CSV Columns runs as plain JavaScript in your browser tab, with no server behind it. Find the sum of CSV columns. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's CSV Tools section, 133 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with the First row is header setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Sum CSV Columns free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.