Common mistake Wrong space/comma in numbers


When it comes to writing numbers, it's important to pay attention to spacing and comma placement. Incorrectly adding or omitting a space or misplacing a comma can lead to confusion and affect the accuracy of your writing. In this article, we will discuss some common mistakes involving spaces and commas in numbers and how to avoid them.

Mistake: Missing Space in Numbers

One common mistake is forgetting to add a space between larger numbers to enhance readability. For example, instead of writing "1000000," it should be written as "1,000,000." The latter is much easier to read and understand.

Mistake: Omitting Commas in Large Numbers

An important rule to remember when writing large numbers is to use commas as separators. This helps to break down the number into smaller units and make it easier to read. For instance, "1000000" should be written as "1,000,000."

Mistake: Misplaced Comma in Decimal Numbers

When writing decimal numbers, it's important to place the comma correctly to avoid confusion. For example, the number "1,235.5" should be written as "1.235,5" in countries where commas are used as decimal separators. Placing the comma in the wrong position can completely change the value of the number.

How to Avoid These Mistakes

  • Double-check your writing: Before finalizing your document, take the time to carefully review all numbers and ensure that they are correctly formatted.
  • Use a grammar checker: Linguix grammar checker is a helpful tool that can detect and correct spacing and comma placement errors in your writing. It's a reliable resource to ensure that your numbers are accurately formatted.
  • Be consistent: Choose a specific format for writing numbers and stick to it throughout your document. This will help maintain consistency and minimize the chances of making errors.
  • Consult style guides: Different style guides may have specific rules regarding number formatting. If you are unsure, consult a style guide such as the Chicago Manual of Style or the Associated Press Stylebook for guidance.


Proper spacing and comma placement in numbers are essential for clear and accurate writing. By paying attention to these details and following the suggestions mentioned above, you can ensure that your numbers are correctly formatted and enhance the readability of your content.

Wrong space/comma in numbers mistake examples

  • Incorrect:
    On June 16,1963 Valentina Tereshkova was launched into space aboard Vostok 6.

    On June 16, 1963 Valentina Tereshkova was launched into space aboard Vostok 6.

  • Correct:
    A day has 86,400 seconds.
  • Incorrect:
    A day has 864,00 seconds.

    A day has 86,400 seconds.

  • Correct:
    A day has 86,400 seconds.
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