Sum CSV Rows
Find the sum of CSV rows. 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 Rows
- 1. Paste your CSV. Drop the comma-separated rows into the input pane. Every row's numeric values are added together to produce a per-row total.
- 2. Confirm the header row. Leave First row is header (skipped) checked so the column name line isn't treated as a row of values to sum along with the actual data.
- 3. Read the row totals. The result lists each row's total in order. Non-numeric values within a row are ignored when computing that row's sum, so partial rows still get a meaningful total.
When to use Sum CSV Rows
Sum CSV Rows adds up the numeric values across each row of a CSV, giving you a per-record total instead of a per-column one. It fits data shaped like a spreadsheet where each row represents an individual entity's several measurements.
- Totaling quarterly figures per product. A CSV lists each product's revenue across four quarterly columns. Summing each row gives you an annual total per product without opening a spreadsheet to add a formula.
- Scoring a rubric with multiple criteria. A CSV of graded submissions has one column per rubric criterion. Summing each row produces a final score per submission ready to record.
- Checking a budget line across categories. Each row of a budget CSV breaks spending into several category columns. Summing per row confirms the total spend for each line item matches expectations.
Examples
Total each row
Input
q1,q2 10,20 5,5
Output
row 1: 30 row 2: 10
About the Sum CSV Rows tool
Sum CSV Rows runs as plain JavaScript in your browser tab, with no server behind it. Find the sum of CSV rows. 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 (skipped) 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 Rows 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.