Decimal (SI) vs Binary (IEC) prefixes

There is a history to this but as this is a tip I won't go over it.

If you like to read more into it see here (external link).

In short, decimal prefixes are one's you are probably used to, where they're equal to 10³ⁿ where n is a positive integer that increases by one for each prefix.

Binary prefixes, on the other hand are equal to 2¹⁰ⁿ.

Binary prefixes are similar to decimal ones however their last two letters are replaced with "bi" (for example kilobyte becomes kibibyte).

Here's a table of some values to show the difference.