Find Matrix Row Sum
Sum of each row. 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 Row Sum
- 1. Paste your matrix. Enter a matrix in the input pane, one row per line, with numbers separated by spaces. Rows can be any width as long as they are consistent.
- 2. Read the row totals. The tool adds every value across each row and lists the total for Row 1, Row 2, and so on, in the order the rows appear.
- 3. Copy the sums. Copy the list of row totals from the output pane into a spreadsheet, report, or the next step of a calculation.
When to use Find Matrix Row Sum
Find Matrix Row Sum adds up the values across each row of a matrix and reports one total per row. It is useful whenever a matrix represents grouped data and you need per-row totals without a spreadsheet.
- Totaling scores per participant. A matrix laid out with participants as rows and criteria as columns needs a total score for each participant, and reading the row sums gives that breakdown instantly.
- Checking a matrix multiplication step by hand. You are verifying an intermediate step in a linear algebra exercise where a row vector should equal the row sums of a matrix, and this confirms the arithmetic.
- Auditing an expense grid. A spreadsheet grid tracks expenses by category across several months as rows, and summing each row tells you the total spent in each month across all categories.
- Verifying a stochastic matrix. A row-stochastic transition matrix used in a Markov chain should have rows that sum to 1, and reading the row sums quickly flags whether the matrix was built correctly.
Examples
Row sums of a 2×3 matrix
Input
1 2 3 4 5 6
Output
Row 1: 6 Row 2: 15
About the Find Matrix Row Sum tool
Find Matrix Row Sum is a free online tool that works entirely inside your web browser. Sum of each row. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 234 Math utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
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.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Find Matrix Row 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.