Storage Units Reference Tool
A comprehensive guide to digital storage units from largest to smallest
This tool provides a complete and organized list of storage size units, from the largest (yottabyte) to the smallest (bit), with clear explanations and real-time conversions.
Storage Unit Converter
Storage Units Hierarchy
Yottabyte (YB)
= 1,024 ZBThe largest standard unit of digital information. The entire internet is estimated to be multiple zettabytes, so we're not at yottabyte scale yet.
Zettabyte (ZB)
= 1,024 EBA massive unit of digital information. By 2025, global data creation is expected to grow to more than 180 zettabytes.
Exabyte (EB)
= 1,024 PBAn extremely large unit of digital information. Major cloud providers store multiple exabytes of data.
Petabyte (PB)
= 1,024 TBA very large unit of digital information. Large organizations and research facilities work with petabytes of data.
Terabyte (TB)
= 1,024 GBA common unit for modern storage devices. Most consumer hard drives are measured in terabytes.
Gigabyte (GB)
= 1,024 MBA common unit for files, RAM, and smaller storage devices. Smartphones typically have storage measured in gigabytes.
Megabyte (MB)
= 1,024 KBUsed for measuring the size of photos, documents, and small applications.
Kilobyte (KB)
= 1,024 BytesUsed for measuring small files like text documents or simple web pages.
Byte (B)
= 8 bitsThe basic unit of digital information. One byte typically represents one character of text.
Bit (b)
= 1/8 of a ByteThe smallest unit of digital information, representing a single binary value: either 0 or 1.
Nibble
= 4 bitsHalf a byte, or 4 bits. Can represent a single hexadecimal digit.
Word
= Processor-dependentThe natural unit of data for a processor. Varies by architecture (e.g., 32-bit or 64-bit).
Double Word (DWORD)
= 2 wordsTwice the size of a word. On a 32-bit system, a DWORD is 64 bits.
Quad Word (QWORD)
= 4 wordsFour times the size of a word. On a 32-bit system, a QWORD is 128 bits.
Storage Capacity Reference Table
| Unit | Abbreviation | Common Use |
|---|---|---|
| Yottabyte | YB | Total global data estimate in future |
| Zettabyte | ZB | Large data centers |
| Exabyte | EB | Corporate/cloud backup |
| Petabyte | PB | Large servers/databases |
| Terabyte | TB | Modern HDDs and SSDs |
| Gigabyte | GB | Mobile, RAM, USB drives |
| Megabyte | MB | Software sizes, images |
| Kilobyte | KB | Text files |
| Byte | B | One character of text |
| Bit | b | Binary data (0 or 1) |
