How to convert gigabytes to kilobytes
To convert gigabytes (GB) to kilobytes (KB), divide the value in gigabytes by 0.000001.
KB = GB ÷ 0.000001 (decimal)
KB = GB × 1,048,576 (binary)
Example: 5 GB = 5,000,000 KB, or 5,242,880 KB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 5 GB to KB into the smart calculator, or mix units: 1 GB + 1 KB.
Gigabytes to Kilobytes conversion table
| Gigabytes | Kilobytes (decimal) | Kilobytes (binary) |
|---|---|---|
| 0.01 GB | 10,000 KB | 10,485.76 KB |
| 0.1 GB | 100,000 KB | 104,857.6 KB |
| 0.25 GB | 250,000 KB | 262,144 KB |
| 0.5 GB | 500,000 KB | 524,288 KB |
| 1 GB | 1,000,000 KB | 1,048,576 KB |
| 2 GB | 2,000,000 KB | 2,097,152 KB |
| 3 GB | 3,000,000 KB | 3,145,728 KB |
| 4 GB | 4,000,000 KB | 4,194,304 KB |
| 5 GB | 5,000,000 KB | 5,242,880 KB |
| 6 GB | 6,000,000 KB | 6,291,456 KB |
| 7 GB | 7,000,000 KB | 7,340,032 KB |
| 8 GB | 8,000,000 KB | 8,388,608 KB |
| 9 GB | 9,000,000 KB | 9,437,184 KB |
| 10 GB | 10,000,000 KB | 10,485,760 KB |
| 12 GB | 12,000,000 KB | 12,582,912 KB |
| 15 GB | 15,000,000 KB | 15,728,640 KB |
| 20 GB | 20,000,000 KB | 20,971,520 KB |
| 25 GB | 25,000,000 KB | 26,214,400 KB |
| 30 GB | 30,000,000 KB | 31,457,280 KB |
| 40 GB | 40,000,000 KB | 41,943,040 KB |
| 50 GB | 50,000,000 KB | 52,428,800 KB |
| 60 GB | 60,000,000 KB | 62,914,560 KB |
| 75 GB | 75,000,000 KB | 78,643,200 KB |
| 100 GB | 100,000,000 KB | 104,857,600 KB |
| 250 GB | 250,000,000 KB | 262,144,000 KB |
| 500 GB | 500,000,000 KB | 524,288,000 KB |
| 1,000 GB | 1,000,000,000 KB | 1,048,576,000 KB |
Converting kilobytes back to gigabytes
1 KB = 0.000001 GB. See the Kilobytes to Gigabytes converter, or press the swap button above.
About the units
Gigabyte (GB)
In decimal mode 1,000,000,000 bytes (1,000 MB); in binary mode 1,073,741,824 bytes (1,024 MB).
Kilobyte (KB)
In decimal (SI) mode 1,000 bytes; in binary mode 1,024 bytes, as Windows and RAM count. The unambiguous binary name is kibibyte (KiB).
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many kilobytes are in a gigabyte?
One gigabyte (GB) equals 1,000,000 kilobytes in decimal (SI) counting, or 1,048,576 kilobytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert gigabytes to kilobytes?
To convert gigabytes to kilobytes, divide the value in gigabytes by 0.000001. The formula is KB = GB ÷ 0.000001. For example, 5 GB = 5,000,000 KB.
What is 5 GB in KB?
5 gigabytes is 5,000,000 kilobytes.
Which is bigger, a gigabyte or a kilobyte?
A gigabyte is bigger: 1 GB = 1,000,000 KB.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this GB to KB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.