File Size Converter

Convert File Sizes Quickly

For upload limits, storage, or download speed, the File Size Converter converts between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes in seconds. It uses the binary base 1024 common to operating systems and storage media. An important distinction: in the decimal system, one kilobyte equals 1000 bytes, but in the binary system it equals 1024 bytes, also called a kibibyte (KiB).

How it works

The conversion is based on the binary base 1024 used by operating systems and storage media. One gigabyte equals 1024 megabytes, one megabyte equals 1024 kilobytes, and one kilobyte equals 1024 bytes. A concrete example: five gigabytes equal 5120 megabytes and 5368709120 bytes, roughly 5.37 billion bytes. In the decimal system, by contrast, one gigabyte equals 1000 megabytes or one billion bytes. The difference matters when it comes to actual storage capacity.

Operating systems such as Windows, macOS, and Linux display storage space in binary. If you see 500 gigabytes on a hard drive, that corresponds in binary to about 500 GiB, while manufacturers often use the decimal base of 1000 and specify gigabytes as 1000 times bytes.

What the tool can and cannot do

The converter reliably converts values between all specified units and shows both decimal and binary conversions. It helps understand and compare storage sizes. However, it is a pure converter without storage or file management capabilities. It cannot convert or compress files, only calculates numbers. It also does not support units outside the usual orders of magnitude.

Why local processing in the browser

The calculation runs entirely on your device. Your input never leaves the computer; there is no server receiving or storing data. Once the page is loaded, the converter works offline too. You can enter various values and try them out without anything being logged or transmitted.

Frequently asked questions