Find Matrix Column Sum
Sum of each column. 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 Find Matrix Column Sum
- 1. Paste your matrix. Enter a matrix in the input pane, one row per line, with numbers separated by spaces. Rows do not need to be square, only consistent in width.
- 2. Read the column totals. The tool adds every value down each column and lists the total for Column 1, Column 2, and so on, in the order the columns appear.
- 3. Copy the sums. Copy the list of column totals from the output pane into a spreadsheet, report, or the next step of a calculation.
When to use Find Matrix Column Sum
Find Matrix Column Sum adds up the values down each column of a matrix and reports one total per column. It is useful whenever a matrix represents grouped data and you need per-column totals without a spreadsheet.
- Totaling a grid of monthly figures. A matrix laid out with months as columns and regions as rows needs a total for each month, and reading the column sums gives you that breakdown instantly.
- Checking a matrix multiplication step by hand. You are verifying an intermediate step in a linear algebra exercise where a column vector should equal the column sums of a matrix, and this confirms the arithmetic.
- Auditing a scoring grid. A judging matrix scores several entries across multiple criteria in columns, and summing each column tells you the total points awarded per criterion across all entries.
- Verifying a probability transition matrix. A Markov chain transition matrix should have columns that sum to 1, and reading the column sums quickly flags whether the matrix was built correctly.
Examples
Column sums of a 2×3 matrix
Input
1 2 3 4 5 6
Output
Column 1: 5 Column 2: 7 Column 3: 9
About the Find Matrix Column Sum tool
Find Matrix Column Sum runs as plain JavaScript in your browser tab, with no server behind it. Sum of each column. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Math Tools section, 234 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
There is nothing to configure. Provide the input and the result appears on its own. 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 Find Matrix Column Sum 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.