Kilobytes (KB) to Bytes (B) Converter
Enter your Kilobytes (KB) value to convert to Bytes (B). 1 KB = 1,000 B, calculated across both decimal (SI) and binary (IEC) standards.
Convert Kilobytes to Bytes
Do you want to convert bytes to kilobytes?
How to Convert Kilobytes to Bytes
To convert kilobytes to bytes, multiply by 1,000. This gives you the equivalent storage size in the target unit. Learn more: Bytes to Kilobytes.
KB: A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Related: KB → ZiB.
B: A byte consists of 8 bits and is the standard unit for measuring digital storage. One byte can represent 256 different values (0-255). Check out our convert GiB to B.
1 KB = 1,000 B (using SI decimal standard) — which means there are 1,000bytes in every kilobyte.
KB to B Conversion Formula
// Convert KB to B
B = KB × 1,000
// Reverse: Convert B to KB
KB = B × 0.001
KB to B Conversion Examples
100 KB = 100,000 B
256 KB = 256,000 B
500 KB = 500,000 B
1,000 KB = 1,000,000 B
2,048 KB = 2,048,000 B
What Is a Kilobyte?
A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. You might also need: Yib to KiB calculator.
The kilobyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. You might also need: EB/s to ZiB/s converter.
Common uses: Text documents, small images, email attachments, configuration files Learn more: KB to ZB.
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 Byte?
A byte consists of 8 bits and is the standard unit for measuring digital storage. One byte can represent 256 different values (0-255). Try the Exabytes in Bytes.
The byte is a fundamental unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Try the converting Exabits to Exbibits.
Common uses: File sizes, memory addressing, character encoding (ASCII, UTF-8) Try the Eibps to bps conversion rate.
1 B = 8 bits = 1 bytes.
The byte can be abbreviated as B; for example, 1 byte can be written as 1 B.
Kilobyte to Byte Conversion Table
The table below shows various kilobyte measurements converted to bytes.
| Kilobytes | Bytes |
|---|---|
| 1 KB | 1,000 B |
| 2 KB | 2,000 B |
| 5 KB | 5,000 B |
| 10 KB | 10,000 B |
| 25 KB | 25,000 B |
| 50 KB | 50,000 B |
| 100 KB | 100,000 B |
| 128 KB | 128,000 B |
| 250 KB | 250,000 B |
| 256 KB | 256,000 B |
| 500 KB | 500,000 B |
| 512 KB | 512,000 B |
| 1,000 KB | 1,000,000 B |
| 1,024 KB | 1,024,000 B |
SI Decimal vs Binary: Why Two Different Standards?
When converting kilobytes to bytes, 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
For accurate capacity planning, always verify whether specifications use SI decimal (base 1000) or binary (base 1024) units. The difference becomes significant at larger scales.
— Subash Geetha Krishnan, 15+ years in enterprise storage
When to Convert KB to B
Common scenario: Planning storage allocation, comparing specifications, or converting between kilobyte and byte for capacity planning. Check out our calculate KB to Eib.
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. Check out our convert Yb to Bytes.