How many bytes are in 1 GiB?

1 gibibyte = 2^30 = 1,073,741,824 bytes exactly. This is the IEC 80000-13 binary standard. It differs from 1 GB (gigabyte), which equals 1,000,000,000 bytes in the SI decimal system.

What is the difference between GiB and GB?

GiB (gibibyte) is a binary unit: 1 GiB = 2^30 = 1,073,741,824 bytes. GB (gigabyte) is a decimal unit: 1 GB = 10^9 = 1,000,000,000 bytes. Operating systems like Windows and Linux report RAM and disk sizes in GiB, while drive manufacturers advertise in GB.

When should I use GiB instead of GB?

Use GiB when working with memory (RAM, cache, VRAM), file systems that align to binary boundaries, or any specification that follows the IEC binary standard. Use GB when referring to storage marketed by manufacturers or network throughput figures.

How do I convert 8 GiB to bytes?

8 GiB × 1,073,741,824 = 8,589,934,592 bytes. Multiply any GiB value by 1,073,741,824 to get the exact byte count.

Why does my OS show a different size than the drive label?

Drive manufacturers label in SI GB (10^9 bytes), but operating systems display in binary GiB (2^30 bytes). A 512 GB drive contains 512,000,000,000 bytes, which Windows or macOS shows as about 476.8 GiB — less than 512 due to the larger binary factor.

Gibibytes to Bytes Converter

Name: Gibibytes to Bytes Converter
Availability: InStock
Author: Nham Vu

Convert gibibytes to bytes using the exact IEC binary factor: 1 GiB = 1,073,741,824 bytes.

Gibibytes to Bytes

Gibibytes (GiB)

1 GiB = 2³⁰ = 1,073,741,824 bytes

Enter a GiB value to see the byte count

Quick Reference — GiB to Bytes

Gibibytes (GiB)	Bytes (B)	Scientific

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Summary

Convert gibibytes to bytes using the exact IEC binary factor: 1 GiB = 1,073,741,824 bytes.

How it works

Enter a gibibyte value in the input field.
The converter multiplies it by 1,073,741,824 (2^30).
The exact byte count appears instantly with comma formatting.
A scientific notation view is shown for large values.
Click Copy to copy the raw byte number to your clipboard.

Use cases

Convert RAM or cache sizes reported in GiB to bytes for low-level programming.
Verify disk partition sizes when working with file system specifications.
Calculate exact memory requirements for embedded systems and firmware.
Cross-check operating system storage reports that use binary GiB units.
Convert cloud instance memory sizes to bytes for API or config parameters.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu