Generate SI Prefixes

Generate SI Prefixes takes raw numbers and converts them into formats like k for thousand, M for million, and so on. Just paste in your list or upload a file, and you’ll get results with the correct SI prefix. It’s clean, fast, and designed to make huge numbers easier to read or compare.

The tool handles line-by-line formatting, lets you choose between using the prefix name or symbol (like “mega” vs “M”), and can round the values to two decimals. Everything updates live, and you can copy or export the result in one click.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .md, .xml
Total characters: 0
Options
Use prefix symbol (e.g. k, M)
Round to 2 decimals
Output line-by-line

How to Use:

  1. Paste your numbers into the Input Numbers box, one per line.
  2. Or click Choose File to upload a supported file type (like .txt or .csv).
  3. Tweak the Options if needed:
    • Use prefix symbol: toggles between symbol (k, M) and full name (kilo, mega).
    • Round to 2 decimals: simplifies output for readability.
    • Output line-by-line: controls if the result is stacked or inline.
  4. Output appears instantly in the SI Prefix Output box.
  5. Use Copy Output to copy the result or Export to File to save it.
  6. Use Clear All to reset everything.

What Generate SI Prefixes can do:

This tool breaks down big numbers using real SI scaling not just lazy shortening. You can switch between symbol and name, which helps for formatting or formal reports. Want more compact output? Enable rounding. Need column formatting? Toggle the line-by-line view.

It works with pasted data or imported files, updating live with every change. And it never runs any code from your file it’s all processed safely in your browser.

Example:

Before:

1000
1500000
4200000000

After (symbols):

1k
1.5M
4.2G

After (names, rounded):

1 kilo
1.5 mega
4.2 giga

Common Use Cases:

Generate SI Prefixes is great when you’re dealing with data logs, finance reports, engineering values, or any numbers that need condensing. Whether you’re formatting outputs for a dashboard or trying to make results more readable, this tool saves time and removes guesswork.

Useful Tools & Suggestions:

Once you’ve got your SI prefixes, Convert a Number to the Scientific Notation fits right in when you’re scaling values up or down. And if you’re tidying up your list, Group Number Digits can make long numbers way easier to read.

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