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Convert Gigabytes to Kilobytes

One gigabyte equals 1,048,576 kilobytes. Type any value to convert gigabytes to kilobytes instantly — with a full reference table below.

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Convert Gigabytes to Kilobytes

⇄ Reverse: Kilobytes to Gigabytes

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Formula

How to convert Gigabytes to Kilobytes

To convert gigabytes to kilobytes, multiply by 1,048,576. One gigabyte equals 1,048,576 KB, and one kilobyte equals 9.53674 × 10⁻⁷ GB.

  1. Take the value in gigabytes — for example 3 GB.
  2. Multiply by 1,048,576 (the number of kilobytes in one gigabyte).
  3. 3 × 1,048,576 = 3,145,728 KB.

Gigabytes to Kilobytes conversion table

GigabytesKilobytes
1 GB1,048,576 KB
2 GB2,097,152 KB
4 GB4,194,304 KB
5 GB5,242,880 KB
8 GB8,388,608 KB
10 GB10,485,760 KB
16 GB16,777,216 KB
20 GB20,971,520 KB
32 GB33,554,432 KB
50 GB52,428,800 KB
64 GB67,108,864 KB
100 GB104,857,600 KB
128 GB134,217,728 KB
256 GB268,435,456 KB
512 GB536,870,912 KB
1,024 GB1,073,741,824 KB
KilobytesGigabytes
1 KB9.53674 × 10⁻⁷ GB
2 KB0.0000019073 GB
4 KB0.0000038147 GB
5 KB0.0000047684 GB
8 KB0.0000076294 GB
10 KB0.0000095367 GB
16 KB0.0000152588 GB
20 KB0.0000190735 GB
32 KB0.0000305176 GB
50 KB0.0000476837 GB
64 KB0.0000610352 GB
100 KB0.0000953674 GB
128 KB0.00012207 GB
256 KB0.000244141 GB
512 KB0.000488281 GB
1,024 KB0.000976562 GB

About converting Gigabytes to Kilobytes

Gigabytes (GB) and Kilobytes (KB) are both units of data storage. The exact factor is 1 GB = 1,048,576 KB, so multiply by 1,048,576 to go from gigabytes to kilobytes (or divide to go back).

The conversion runs entirely in your browser. Need the reverse? Use the Kilobytes to Gigabytes converter, or the full unit converter for every unit at once.

Binary vs decimal: why your drive looks smaller

Windows and RAM reports count in powers of 1,024 (binary, sometimes written KiB/MiB/GiB); drive makers, macOS and mobile carriers count in powers of 1,000 (decimal). Same bytes, two answers:

GigabytesKilobytes (binary · Windows)Kilobytes (decimal · on the box)
1 GB1,048,576 KB1,000,000 KB
2 GB2,097,152 KB2,000,000 KB
4 GB4,194,304 KB4,000,000 KB
5 GB5,242,880 KB5,000,000 KB
8 GB8,388,608 KB8,000,000 KB
10 GB10,485,760 KB10,000,000 KB
16 GB16,777,216 KB16,000,000 KB
20 GB20,971,520 KB20,000,000 KB
32 GB33,554,432 KB32,000,000 KB
50 GB52,428,800 KB50,000,000 KB

Example: a “1 TB” drive holds 10¹² bytes, which Windows shows as about 931 GB.

Real-world data storage in gigabytes and kilobytes

ExampleGigabytesKilobytes
A 4-minute MP3 at 128 kbps0.00357628 GB3,750 KB
A CD0.683594 GB716,800 KB
A single-layer DVD (4.7 GB)4.377216 GB4,589,844 KB
A 50 GB dual-layer Blu-ray46.56613 GB48,828,125 KB

“≈” marks typical values; the rest are defined or measured figures.

The units

Gigabytes (GB)

Here, 1,024 MB = 1,073,741,824 bytes (GiB). Decimal gigabyte = 1,000,000,000 bytes.

Used for: Phone storage, mobile data, RAM.

Kilobytes (KB)

Here, 1,024 bytes (binary, also written KiB). Decimal kilobyte = 1,000 bytes.

Used for: Small files, documents.

This page uses binary units (1 KB = 1,024 bytes), which is how Windows and most RAM reports count. Storage makers and macOS use decimal units (1 kB = 1,000 bytes), so both are shown below.

Frequently asked questions

5 answers
How many kilobytes are in one gigabyte?
One gigabyte equals 1,048,576 kilobytes.
How do I convert gigabytes to kilobytes?
Multiply the number of gigabytes by 1,048,576. For example, 10 gigabytes = 10,485,760 kilobytes.
What is 5 gigabytes in kilobytes?
5 gigabytes is 5,242,880 kilobytes.
Is a gigabyte bigger than a kilobyte?
Yes. One gigabyte equals 1,048,576 kilobytes, so it is 1,048,576 times larger.
How many kilobytes is a single-layer DVD?
A single-layer DVD is 4,589,844 kilobytes (4.377216 gigabytes).