Byte to Gigabyte Converter (B to GB)

1 byte equals 0.000000001 gigabytes (GB) — multiply the number of bytes by 1 × 10⁻⁹ to convert. A decimal gigabyte is 1,000,000,000 bytes, so one billion bytes make up a single gigabyte.

The formula

Multiply bytes by the exact factor 1e-9:

GB = bytes × 0.000000001

For example, 500000000 bytes × 1e-9 = 0.5 GB. To reverse it, divide by 1e-9 or multiply by 1,000,000,000.

Conversion table

How to convert online

1. Type the number of bytes into the first box.
2. Read the gigabyte result instantly in the second box.
3. Enter a GB value instead to convert back to bytes — it works both ways.

Use the Byte to Gigabyte Converter — free and instant in your browser.

Where this conversion is used

Raw byte counts show up in logs, APIs and file metadata, while storage and quotas are planned in gigabytes. Converting bytes to GB lets you turn a precise byte figure — say a database dump or a folder total — into the gigabyte scale used for disks, cloud plans and data caps.

Scaling and accuracy

The conversion is linear, so scaling is simple: since 1,000,000,000 bytes = 1 GB, then 500,000,000 bytes = 0.5 GB and 2,000,000,000 bytes = 2 GB. A quick shortcut is to shift the decimal point nine places left. This tool uses decimal (SI) gigabytes where 1 GB = 10⁹ bytes, the value drive makers and cloud providers advertise. The binary gibibyte (1 GiB = 2³⁰ bytes) is about 7.4% larger, which is why a 500 GB drive often shows around 465 GiB in a file manager — confirm which standard your source means before comparing.

FAQ

How many gigabytes are in a byte?

One byte equals 0.000000001 GB. Multiply bytes by 1e-9 — for example, 10 bytes = 0.00000001 GB.

How many bytes are in a gigabyte?

A decimal gigabyte holds 1,000,000,000 bytes. So 1 GB = one billion bytes.

How do I convert gigabytes back to bytes?

Divide by 1e-9, or multiply by 1,000,000,000. For instance, 2 GB = 2,000,000,000 bytes.

Is the conversion exact?

Yes. 1e-9 is an exact decimal factor, so results are precise.

Related converters

• Gigabyte to Byte Converter
• Byte to Bit Converter
• Byte to Kilobyte Converter
• Byte to Megabyte Converter

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