Key Difference: A Gigabit and a Gigabyte, both are used as the measure of storage capacity. One gigabit is equal to 1 million bits, whereas, gigabyte is equal to 8000 million bits.

Many believe that Gigabit and Gigabyte are synonyms of each other, but truly, they are not.

The abbreviation of both the terms, Gigabit and Gigabyte is GB, but for gigabit it is abbreviated as G or Gb and for gigabyte it is abbreviated as GB. The memory card which we insert in our mobile phones varies in GB’s. It can be 2GB, 4GB, 8 GB, 32GB or 64GB.

A bit is a binary digit, taking a value of either 0 or 1. For example: the 10110010 is 8 bits long or one byte. Eight bits equal to a byte. In the International System of Units, the gigabit has the unit symbol Gbit or Gb. It is used for data transfer rates.

On the other hand, gigabyte is 2 to the 30^th power (1,073,741,824) bytes. It is often abbreviated as GB.

There’s a very simple difference between Gigabit and Gigabyte. Gigabit transfers at the speed which is known as Gbps, whereas gigabyte is a type of storage capacity. The hard disk capacity or memory card capacity is gigabyte. To summarize, a bit is eight times smaller than a byte, and proportionately, a gigabit is eight times smaller than a gigabyte.

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