Preview lessons, content and tests

Computer Science & Programming solved. All in one platform.

1. To trial the platform and take tests, please take a few seconds to SIGN UP and SET UP FREE.
2. Searching for something specific? See our text overview of all tests. Includes 'real teacher' use videos.

Join 30000+ teachers and students using TTIO.

Calculate number of bits saved

File size is a measure of how much data a computer file contains or, alternately, how much storage it consumes. Typically, file size is expressed in units of measurement based on the byte. 

By convention, file size units use either a metric prefix (as in megabyte and gigabyte) or a binary prefix (as in mebibyte and gibibyte).

When a file is written to a file system, which is the case in most modern devices, 
it may consume slightly more disk space than the file requires.