Round a Number

Round a Number helps you quickly format numbers the way you want. Choose between rounding up, down, or to the nearest whole or even round to a specific number of decimal places. It’s quick, flexible, and all done in your browser.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Round to decimal places

How to Use:

  1. Paste your numbers into the input box, one per line.
  2. Or import a file using the “Choose File” button.
  3. Under Options, choose a rounding mode: round, floor, or ceil.
  4. Enable “Round to decimal places” if you want to control precision.
  5. Set how many decimal places you want in the input next to it.
  6. The rounded results will update live in the right-hand box.
  7. Use Copy Output or Export to save the result.

What Round a Number can do:

It’s more than just rounding you get total control over how numbers are formatted. Want clean integers? Use Round mode. Need to force all values down or up? Flip it to Floor or Ceil. And if you’re working with decimal precision, just turn on the toggle and pick how many places. It even flashes when it updates so you know something happened.

Example:

Input:

12.8
3.14159
99.99

With Options: Mode: Round, Decimal Toggle ✓, Decimals: 2

Output:

12.80
3.14
99.99

Common Use Cases:

Great for prepping data for spreadsheets, APIs, or exports that need clean numerical formatting. Whether you’re cleaning up user input, rounding values for display, or applying rules for processing this makes it fast and simple. No install, no delay.

Useful Tools & Suggestions:

After rounding, Group Number Digits can help tidy up larger values so they’re easier to scan. And if you’re experimenting with calculations, Calculate the Modulo is useful for checking what gets left behind after division.

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