How many kibibytes are in a gibibyte?

Exactly 1,048,576 KiB. One gibibyte equals 2^30 bytes, and one kibibyte equals 2^10 bytes, so 1 GiB ÷ 2^10 = 2^20 = 1,048,576 KiB.

What is the difference between GiB and GB, or KiB and KB?

GiB (gibibyte) and KiB (kibibyte) use binary IEC units — powers of 2. GB (gigabyte) and KB (kilobyte) use SI decimal units — powers of 10. 1 GiB ≈ 1.0737 GB; 1 KiB = 1.024 KB. The GiB-to-KiB factor (1,048,576) differs from the decimal GB-to-KB factor (1,000,000) by about 4.86%.

Why does my operating system show memory in GiB instead of GB?

Operating systems address memory in binary units because hardware uses powers-of-two addressing. Modern OSes label these correctly as GiB (or MiB, KiB), though older systems and some consumer interfaces still print "GB" informally when the underlying unit is actually GiB.

Can I convert fractional gibibytes?

Yes. Enter any decimal value such as 0.5 or 2.75 and the tool returns the precise KiB count. For example, 0.5 GiB = 524,288 KiB.

How do I convert kibibytes back to gibibytes?

Divide the KiB count by 1,048,576. For example, 2,097,152 KiB ÷ 1,048,576 = 2 GiB.

Gibibytes to Kibibytes Converter

Enter a value in gibibytes (GiB) and get the exact kibibyte count using the binary IEC standard (1 GiB = 1,048,576 KiB).

Gibibytes Input

Amount (GiB)

Quick values

Binary IEC: 1 GiB = 2²⁰ KiB = 1,048,576 KiB

Kibibytes (KiB)

—

Enter a value to see the calculation.

Also equivalent to

Bytes —

Mebibytes (MiB) —

Megabytes (MB, decimal) —

Kilobytes (KB, decimal) —

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Summary

This tool converts gibibytes (GiB) to kibibytes (KiB) using the binary IEC standard, where 1 GiB equals 2^30 bytes and 1 KiB equals 2^10 bytes, giving an exact factor of 2^20 = 1,048,576 KiB per GiB. Unlike the SI decimal gigabyte (GB) and kilobyte (KB), these IEC binary units are unambiguous — always powers of two. This matters in RAM sizing, OS memory reports, kernel buffer allocations, and any low-level context where exact binary arithmetic is required.

How it works

Enter the number of gibibytes in the input field.
The tool multiplies your value by 1,048,576 (2^20) to get kibibytes.
The result appears instantly below the input.
A formula line shows the exact calculation for verification.
Click Copy to copy the raw numeric result to your clipboard.

Use cases

Convert RAM sizes reported in GiB by an OS to KiB for kernel or driver configuration.
Translate memory allocation figures for embedded systems using IEC binary units.
Verify buffer sizes when a specification mixes GiB and KiB units.
Calculate kibibyte-level page tables or cache partitions from a GiB total.
Cross-check storage capacity figures in technical or firmware documentation.
Determine kibibyte equivalents for gibibyte quotas in file systems.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu