Gigabits to Gigabytes (Gb to GB)
1 gigabit equals 0.125 gigabytes exactly.
How to convert gigabits to gigabytes
To convert gigabits to gigabytes, multiply the number of gigabits by 0.125. This factor is exact. To go the other way, multiply gigabytes by 8.
gigabytes = gigabits × 0.125
Example: 10 gigabits = 1.25 gigabytes.
Decimal prefixes (kB, MB, GB) are powers of 1,000; binary prefixes (KiB, MiB, GiB) are powers of 1,024. Storage makers use decimal; Windows reports binary but labels it GB.
About these units
Gigabit (Gb)
1,000,000,000 bits (125 MB).
Gigabit is one billion bits, or 125 million bytes. In the IEC notation it is written Gbit, while IEEE 1541-2002 recommends Gb, which may be confused with GB for gigabyte. The binary counterpart, the gibibit, is 2 to the thirtieth bits. Network links and fiber are usually rated in gigabits per second, because data transfer rates are measured in decimal SI multiples.
Memory is where gigabits and binary habits collide. Chip capacity is often given in binary multiples using the ambiguous G prefix rather than the IEC Gi, so a DRAM chip advertised as 1 GB has 2 to the thirtieth bytes. The Wikipedia article on the bit says this was still causing difficulty for software designers as of 2022. When you see a gigabit rate, divide by eight for gigabytes per second.
1 gigabit = 125,000,000 bytes (exactly).
Sources: Wikipedia: Gigabit; Wikipedia: Bit
Gigabyte (GB)
1,000,000,000 bytes (decimal). Storage manufacturers and phone makers use this definition.
The gigabyte is where the decimal-versus-binary dispute turned into lawsuits. Drive makers advertise capacity in decimal units, so a 500 GB drive holds 500 billion bytes, but Windows reports sizes in binary units and shows about 465.7 of what it labels GB for the same drive. Early challenges against Western Digital and Seagate were settled, with Western Digital adding disclaimers that usable capacity may differ from the advertised figure.
A 2019 lawsuit was decided in the manufacturers' favor, with the court relying on the decimal definition. For scale, one gigabyte holds roughly an hour of standard-definition video at 2.2 Mbit/s. A single-layer DVD+R holds about 4.7 GB and a single-layer Blu-ray about 25 GB. RAM is still often sized in binary gigabytes, which the IEC would call gibibytes.
1 gigabyte = 1,000,000,000 bytes (exactly).
Sources: Wikipedia: Gigabyte; Wikipedia: Binary prefix; Wikipedia: Gibibyte
Related conversions
- Gigabytes to gigabits (reverse)
- Gigabits to bytes
- Gigabits to kilobytes
- Gigabits to megabytes
- Gigabits to terabytes
- Gigabits to bits
- Gigabits to petabytes
- Gigabits to kibibytes
- Gigabits to mebibytes
- Gigabits to gibibytes
- Gigabits to tebibytes
- Gigabits to kilobits
- Gigabits to megabits
- Bytes to gigabytes
- Kilobytes to gigabytes
- Megabytes to gigabytes
- Terabytes to gigabytes
- Bits to gigabytes
- Petabytes to gigabytes
- Kibibytes to gigabytes
- Mebibytes to gigabytes
- Gibibytes to gigabytes
- Tebibytes to gigabytes
- Kilobits to gigabytes
- Megabits to gigabytes
See all digital storage units.