Add Integers

The Add Integers tool instantly adds up a list of whole numbers and gives you the total. Whether you’re pasting in raw data, building up a running total, or checking a column of values, this tool gets it done fast no spreadsheet required.

You can enter integers line-by-line, or separate them with spaces or commas. It handles negative numbers, skips invalid input (if you want), and updates in real time as you type. You can also enable a running total to see how the sum builds line by line.

Everything runs in your browser and stays local no uploading, no waiting.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total valid integers: 0
Options
Ignore non-integers
Show running total
Maximize output

How to Use:

  • Paste or type integers into the Input Integers box
    • You can separate values with newlines, spaces, or commas
  • Toggle Ignore non-integers to skip invalid entries (like text)
  • Enable Show running total to see the sum grow line by line
  • Use Maximize output to expand the output box for longer results
  • Click Add to calculate the total (live update also happens as you type)
  • Use Copy Output or Export to File to save results
  • Click Clear All to reset everything and start over

What Add Integers can do:

This tool gives you a quick way to total up lists of whole numbers. It’s flexible about formatting and spacing, works with both positive and negative numbers, and gives immediate results. You can track individual line sums using the running total mode, or just get the final answer.

Example:

Input:

10
20
-5
100

Output (running total OFF):

125

Output (running total ON):

10
30
25
125

Common Use Cases:

Use this tool to sum values from logs, receipts, exported data, or problem sets. It’s perfect for teachers, developers, or anyone who needs fast, local number crunching without opening Excel. It also works great as a lightweight check tool when doing manual calculations.

Useful Tools & Suggestions:

After using Add Integers, try Add Integer Digits to look at how the internal structure of each number contributes to the whole. And if you’re running multiple calculations, Find the Running Total keeps a live tally as you go.

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