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Data Storage Converter

Convert data storage between bits, bytes, KB, MB, GB, TB, and PB. Switch between decimal (SI) and binary (IEC) prefixes.

Converter Tools Runs locally No data sent
KBMBGBTBbinary
Prefix standard
Storage
Quick examples
Reference sizes
ItemApprox. size
Text file (1 page)~4 KB
MP3 song (4 min)~4 MB
HD photo (JPEG)~3— MB
4K video (1 min)~400 MB
DVD movie~4.7 GB
Blu-ray movie~25—0 GB
Laptop SSD256 GB —2 TB

What is a Data Storage Converter?

A data storage converter translates values between units of digital information: bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. There are two standards: decimal (SI), where 1 KB = 1,000 bytes, used by hard drive manufacturers; and binary (IEC), where 1 KiB = 1,024 bytes, used by operating systems. This tool supports both.

How to Use Data Storage Converter

  1. Choose a prefix standard: Decimal (SI) or Binary (IEC).
  2. Type a value into any unit field.
  3. All other units update instantly.
  4. Use the quick example buttons to start from common sizes.

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Decimal vs Binary Prefixes ▾
Example
Input 1 GB
Output 1,000 MB / 1,000,000 KB / 0.001 TB
Common Use Cases
  • Comparing advertised drive sizes to OS-reported sizes
  • Cloud storage and bandwidth planning
  • Converting network transfer speeds (Mbps to MB/s)
  • Software and database sizing
Frequently Asked Questions
What is the difference between KB and KiB?

KB (kilobyte) is 1,000 bytes in the SI/decimal system used by storage manufacturers. KiB (kibibyte) is 1,024 bytes in the binary/IEC system used by operating systems. This is why a "500 GB" hard drive shows as ~465 GB in Windows.

How many bytes are in a gigabyte?

In the decimal (SI) system: 1 GB = 1,000,000,000 bytes. In the binary (IEC) system: 1 GiB = 1,073,741,824 bytes.

What is a petabyte?

A petabyte (PB) is 1,000 terabytes or 10^15 bytes in decimal. It is used to measure data centre and cloud storage capacities.

Why does my hard drive show less space than advertised?

Manufacturers use decimal (1 GB = 10^9 bytes), but operating systems measure in binary (1 GiB = 2^30 bytes). A 1 TB drive contains ~931 GiB as reported by your OS.