How do I add negative numbers and decimals correctly?

Use delimiter extraction and select the separator between complete numeric values. Smart extraction matches digit groups, so it does not preserve decimal points or negative signs.

Why does the sum tool ignore some text entries?

Delimiter mode skips blank entries and entries that cannot become numbers. A completed sum therefore does not prove that every input item was valid.

Can I show a running total after each number?

Enable running sum to output each cumulative total. The calculation uses JavaScript numbers, so very large integers can exceed exact numeric precision.

Sum Numbers | Tool Factory

Tool workspace

Needs input

Your input stays in this browser.

Input

Add your source and choose the required options.

Numbers

Sum options

Number detection

Show the running sum

Results update automatically.

Your result appears here

Complete the required input to continue.

Direct answer

What Sum Numbers does

Sum Numbers helps you add a list of numbers and show the total. You can add values, choose the needed options, and review the text result.

Output

What you receive

The tool returns a text result. Check the result before you use it in another system.

Use this tool

How to use Sum Numbers

Add the values that you want to process.
Use the available controls to choose the required options.
Review the text result. Copy or download it when the tool provides that action.

Processing

Browser processing

This tool processes its input in your browser. Your files and text stay on your device.

Limits

Check before you use the result

The result depends on the quality and format of the supplied values.
Closing this page clears the active task from the interface.

Topics

Explore connected categories

Numbers, Units & Calculators