Gigabytes to Bytes Converter

Gigabytes to Bytes

Convert gigabytes (GB) to bytes (B). Both measure digital storage, and the conversion comes up in computing, storage, internet work.

The Formula

`` bytes = gigabytes × 1000000000 gigabytes = bytes × 1e-9 `

One gigabyte is 1,000,000,000 bytes, and one byte is 1.0000e-9 gigabytes.

Conversion Table

Gigabytes	Bytes
1 GB	1,000,000,000 B
2 GB	2,000,000,000 B
5 GB	5,000,000,000 B
10 GB	10,000,000,000 B
25 GB	25,000,000,000 B
50 GB	50,000,000,000 B
100 GB	100,000,000,000 B
500 GB	500,000,000,000 B
1,000 GB	1,000,000,000,000 B

The Other Direction

Bytes	Gigabytes
1 B	1.0000e-9 GB
2 B	2.0000e-9 GB
5 B	5.0000e-9 GB
10 B	1.0000e-8 GB
25 B	2.5000e-8 GB
50 B	5.0000e-8 GB
100 B	1.0000e-7 GB
500 B	5.0000e-7 GB
1,000 B	1.0000e-6 GB

What Each Unit Is

Gigabytes (GB) — 1,000,000,000 bytes in decimal usage. The unit of modern storage and mobile data plans.

Bytes (B) — 8 bits. Coined at IBM in 1956 for the group of bits encoding one character.

A Sense of Scale

• An HD film is 4–8 GB
• A phone ships with 128–512 GB
• One ASCII character is 1 byte
• A UTF-8 emoji is often 4 bytes

Precision

The factor 1000000000 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.

In Code

`javascript const gigabyteToByte = (value) => value * 1000000000; ``

Where This Conversion Comes Up

• Computing
• Storage
• Internet
• Media
• Backups

How Many Decimals Do You Need?

Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 GB with the factor truncated at each decimal place:

Decimals kept	Factor	137 GB becomes	Error
0	1000000000	137,000,000,000	—
1	1000000000	137,000,000,000	—
2	1000000000	137,000,000,000	—
3	1000000000	137,000,000,000	—
4	1000000000	137,000,000,000	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured gigabytes to three significant figures, the answer in bytes is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Gigabytes

The same value in every other unit this converter supports for data:

From	To	Unit
1 GB	8,000,000,000 b	Bits
1 GB	8,000,000 Kb	Kilobits
1 GB	1,000,000 KB	Kilobytes
1 GB	8,000 Mb	Megabits
1 GB	1,000 MB	Megabytes
1 GB	0.001 TB	Terabytes

Chaining conversions works — gigabytes to metres to feet gives the same answer as gigabytes to feet — but each step rounds, so a chain of three conversions carries three roundings. Convert directly where a direct factor exists.