Kilobytes (KB) to Kibibytes (KiB) Converter
Enter your Kilobytes (KB) value to convert to Kibibytes (KiB). 1 KB = 0.9765625 KiB, calculated across both decimal (SI) and binary (IEC) standards.
Convert Kilobytes to Kibibytes
Do you want to convert kibibytes to kilobytes?
How to Convert Kilobytes to Kibibytes
To convert kilobytes (decimal/SI) to kibibytes (binary/IEC), multiply by 0.9765625. Decimal units use base 1,000, while binary units use base 1,024. Use our Kibibytes to Kilobytes converter.
KB is a decimal (SI) unit—what storage manufacturers advertise. 1 KB = 1,000 of the smaller unit. Use our Kilobytes to Terabytes.
KiB is a binary (IEC) unit—what operating systems often display. 1 KiB = 1,024 of the smaller unit. Related: Kib → KiB.
1 KB = 0.9765625 KiB (using SI decimal standard) — or equivalently, 1 KiB = 1.024KB.
KB to KiB Conversion Formula
// Convert KB to KiB
KiB = KB × 0.9765625
// Reverse: Convert KiB to KB
KB = KiB × 1.024
KB to KiB Conversion Examples
100 KB = 97.65625 KiB
256 KB = 250 KiB
500 KB = 488.28125 KiB
1,000 KB = 976.5625 KiB
2,048 KB = 2,000 KiB
What Is a Kilobyte?
A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Check out our convert PiB to GB.
The kilobyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Learn more: EiB/s to Eibps calculator.
Common uses: Text documents, small images, email attachments, configuration files Check out our KB to B converter.
1 KB = 8,000 bits = 1,000 bytes.
The kilobyte can be abbreviated as KB; for example, 1 kilobyte can be written as 1 KB.
What Is a Kibibyte?
A kibibyte is 1,024 bytes using the IEC binary standard. More accurately represents computer memory addressing. Learn more: nibble to KiB.
The kibibyte is a IEC binary unit of digital information storage. It uses base 1,024 following the IEC (International Electrotechnical Commission) standard. Related: Yobibytes in Kibibits.
Common uses: RAM specifications, operating system file sizes, memory allocation Try the converting Kilobits Per Second to Bytes Per Second.
1 KiB = 8,192 bits = 1,024 bytes.
The kibibyte can be abbreviated as KiB; for example, 1 kibibyte can be written as 1 KiB.
Kilobyte to Kibibyte Conversion Table
The table below shows various kilobyte measurements converted to kibibytes.
| Kilobytes | Kibibytes |
|---|---|
| 1 KB | 0.9765625 KiB |
| 2 KB | 1.953125 KiB |
| 5 KB | 4.8828125 KiB |
| 10 KB | 9.765625 KiB |
| 25 KB | 24.4140625 KiB |
| 50 KB | 48.828125 KiB |
| 100 KB | 97.65625 KiB |
| 128 KB | 125 KiB |
| 250 KB | 244.140625 KiB |
| 256 KB | 250 KiB |
| 500 KB | 488.28125 KiB |
| 512 KB | 500 KiB |
| 1,000 KB | 976.5625 KiB |
| 1,024 KB | 1,000 KiB |
SI Decimal vs Binary: Why Two Different Standards?
When converting kilobytes to kibibytes, different tools may give slightly different results. This is because there are two competing standards for measuring digital storage:
| Standard | Base | 1 KB equals | Used By |
|---|---|---|---|
| SI Decimal | 1000 | 1,000 bytes | Hard drive manufacturers, macOS, network speeds |
| Binary (IEC) | 1024 | 1,024 bytes | Windows, Linux (partially), RAM specifications |
Why Does My Hard Drive Show Less Space Than Advertised?
This difference in standards explains the common "missing hard drive space" confusion.
Example: A "500 GB" Hard Drive
- Contains exactly: 500,000,000,000 bytes
- macOS (SI Decimal): Displays 500 GB (divides by 1,000³)
- Windows (Binary): Displays 465 GB (divides by 1,024³)
The Verdict: Same bytes, same drive—just different math. No space is actually missing.
Note: Our calculator defaults to SI decimal (base 1000) to match the box label. To match Windows, toggle the standard at the top of the calculator.
💡 Storage Engineer Tip
The ~9.95% difference between binary and decimal units compounds at each level. A 1 TB drive shows as 931 GiB in Windows because of this standard mismatch—no space is actually lost.
— Subash Geetha Krishnan, 15+ years in enterprise storage
When to Convert KB to KiB
Common scenario: Reconciling the difference between what drive manufacturers advertise and what your operating system displays. Learn more: KB to ZB conversion rate.
Other situations include storage planning for calculating how much data fits in a given capacity, file management for understanding sizes across different scales, cost estimation for budgeting cloud storage, and backup planning for determining media requirements. Related: Gibibits to Kibibytes calculator.