Skip to the calculator
Rule Calculator

Convert Gigabytes to Kilobytes

1 gigabyte is 1,000,000 kB. One gigabyte is exactly 1000000 kilobytes.

One gigabyte is 1000000 kilobytes. To convert gigabytes to kilobytes, multiply by 1000000; to go the other way, divide by 1000000 or multiply by 1.0000 × 10^-6. The factor is exact rather than rounded: it follows from IEC 80000-13. Exactly one billion bytes.

Factor checked against the defining standard · How we check

Kilobytes
1,000,000 kB
Gigabytes × 1000000
value * 10000001,000,000 kB

1 gigabyte in every data unit

UnitValueExact factor
bytes1,000,000,000 B× 1,000,000,000
kilobytes1,000,000 kB× 1,000,000
megabytes1,000 MB× 1,000
gigabytes (as entered)1 GB
terabytes0.001 TB× 0.001
kibibytes976,562.5 KiB× 976,562.5
mebibytes953.6743164 MiB× 953.674316406
gibibytes0.9313225746 GiB× 0.931322574615

Factors are entered by hand from IEC 80000-13 rather than derived from a units library, so the ones that terminate are exact rather than rounded.

How do you convert gigabytes to kilobytes?

  1. 1.Take the measurement in gigabytes.
  2. 2.Multiply by 1000000 — that is how many kilobytes fit in one gigabyte.
  3. 3.To go back the other way, divide by 1000000, or multiply by 1.0000 × 10^-6.

Gigabytes to kilobytes conversion table

GigabytesKilobytes
1 GB1,000,000 kB
2 GB2,000,000 kB
3 GB3,000,000 kB
4 GB4,000,000 kB
5 GB5,000,000 kB
6 GB6,000,000 kB
7 GB7,000,000 kB
8 GB8,000,000 kB
9 GB9,000,000 kB
10 GB10,000,000 kB
12 GB12,000,000 kB
15 GB15,000,000 kB
20 GB20,000,000 kB
25 GB25,000,000 kB
50 GB50,000,000 kB
100 GB100,000,000 kB

What are gigabytes and kilobytes?

Gigabyte (GB)
Exactly one billion bytes. This is why a "1 TB" drive shows as roughly 931 GB in Windows: the drive is sold in decimal and displayed in binary.
Kilobyte (kB)
Exactly 1,000 bytes under the SI prefix, which is what drive manufacturers and network speeds use. Not 1,024 — that is the kibibyte.

Source: IEC 80000-13 — binary prefixes for information quantities

Questions people actually ask

How many kilobytes are in a gigabyte?
1000000. Exactly 1,000 bytes under the SI prefix, which is what drive manufacturers and network speeds use. Not 1,024 — that is the kibibyte.
How do I convert kilobytes back to gigabytes?
Divide by 1000000, or multiply by 1.0000 × 10^-6 — they are the same operation.

Other data conversions

Kilobytes to gigabytes — the same conversion the other way.