Byte Converter

Convert B/KB/MB/GB/TB/PB + KiB/MiB/GiB/TiB (SI/IEC)

100% In-BrowserNo Server UploadFree, No Signup

Math & Calculation

Input Value

Conversion Result

How to Use

Select source unit
Choose the source unit (B/KB/MB/GB/TB, etc.) from the toolbar.
Enter a number
Enter the value to convert. Both SI (1000-based) and IEC (1024-based) results are shown.
Copy result
Use the "Copy" button to copy the results to your clipboard.

Byte Converter Examples

Convert 1 GB to bytes

Input

Output

--- SI (1000-based) ---
1,000,000,000 B
1,000,000 KB
1,000 MB
1 GB
0.001 TB

--- IEC (1024-based) ---
1,000,000,000 B
976,562.5 KiB
953.674 MiB
0.931323 GiB

--- Bits ---
8,000,000,000 bit

Result when source unit is "GB".

Convert 1024 bytes

Input

Output

--- SI (1000-based) ---
1,024 B
1.024 KB

--- IEC (1024-based) ---
1,024 B
1 KiB

--- Bits ---
8,192 bit

Source unit is "B". 1024B = 1 KiB but 1.024 KB.

Features

SI (1000-based: KB/MB/GB/TB/PB) and IEC (1024-based: KiB/MiB/GiB/TiB/PiB) side by side
Bit count display
Source unit selection via toolbar
High-precision conversion results
Real-time conversion (auto-updates on input)
Local processing (your input is not sent to servers)
Dark mode support

FAQ

What is the difference between KB and KiB?

KB (kilobyte) is an SI unit where 1 KB = 1000 bytes. KiB (kibibyte) is an IEC unit where 1 KiB = 1024 bytes. Different operating systems and software use different conventions.

Why are there two unit systems?

Computers operate on powers of 2 (1024) but SI units use powers of 10 (1000). IEC units (KiB/MiB/GiB) were introduced to avoid confusion.

Is my data sent to a server?

No. All conversion happens locally in your browser via JavaScript. No data is ever transmitted externally.