Kilobyte vs. Gigabyte — What's the Difference?

The kilobyte is a multiple of the unit byte for digital information. The International System of Units (SI) defines the prefix kilo as 1000 (103); per this definition, one kilobyte is 1000 bytes.

The gigabyte () is a multiple of the unit byte for digital information. The prefix giga means 109 in the International System of Units (SI).

A unit of computer memory or data storage capacity equal to 1,024 (210) bytes.

A unit of information equal to one thousand million (10⁹) or, strictly, 2³⁰ bytes.

One thousand bytes. See Usage Note at gigabyte.

A unit of computer memory or data storage capacity equal to 1,024 megabytes (230 bytes).

One thousand (10³, or 1,000) bytes.

One billion bytes.

A kibibyte.

(SI) 10⁹, one billion (1,000,000,000) bytes. SI symbol: GB

A unit of information equal to one thousand (1024) bytes

(computing) A gibibyte or 1024³ (1,073,741,824) bytes.

A unit of information equal to one billion (1,073,741,824) bytes or 1024 megabytes