Enter the file size in megabytes and the number of files to calculate the total disk usage. This calculator helps in estimating the storage space required for a set of files.

Disk Usage Formula

The following formula is used to calculate the disk usage.

DU = FS * FC


  • DU is the disk usage (megabytes)
  • FS is the file size (megabytes per file)
  • FC is the number of files

To calculate the disk usage, multiply the file size by the number of files.

What is Disk Usage?

Disk usage is the amount of storage space that files occupy on a storage device such as a hard drive, SSD, or cloud storage. It is an important metric for managing data storage, ensuring that there is enough space for new files, and for optimizing the use of available storage resources.

How to Calculate Disk Usage?

The following steps outline how to calculate the Disk Usage.

  1. First, determine the file size (FS) in megabytes.
  2. Next, determine the number of files (FC).
  3. Next, gather the formula from above = DU = FS * FC.
  4. Finally, calculate the Disk Usage (DU) in megabytes.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

file size (FS) = 5 megabytes

number of files (FC) = 100