Formatting units of measurement
When specifying a unit of measurement, use a nonbreaking space between the number and the unit. This guidance applies to HTML and Markdown sources.
Not recommended: 64GB
However, when the unit of measure is money, degrees, or percent, don't leave a space.
In some contexts, it may be appropriate to indicate thousands of something by following a number with a lowercase "k". If you do that, then follow these guidelines:
- Don't put a space between the number and "k".
- Add a noun to indicate what the number measures, and to make clear that you're not using "k" as an abbreviation for "kilobytes."
Recommended: On this plan, you are limited to 55k download operations and 20k upload operations per day.