Memory Sizes (MB, GB, TB, PB)
There are various memory sizes in IT that are used for different purposes.
- Byte: A byte is the smallest unit of digital memory and corresponds to eight bits. A byte can assume a value from 0 to 255.Kilobyte (KB): One kilobyte is equal to 1,024 bytes.
- Megabyte (MB): One megabyte is equal to 1,024 kilobytes or 1,048,576 bytes.
- Gigabyte (GB): One gigabyte is equal to 1,024 megabytes or 1,073,741,824 bytes.
- Terabyte (TB): One terabyte is equal to 1,024 gigabytes or 1,099,511,627,776 bytes.
- Petabyte (PB): A petabyte is equal to 1,024 terabytes or 1,125,899,906,842,624 bytes.
There are also even larger storage sizes or units such as the exabyte (EB), the zettabyte (ZB), and the yottabyte (YB), but these are usually only used in very large data centers or in scientific research.
More glossary articles
Book Recommendation
Customer Intelligence: Strategies and Use Cases for Leveraging Customer Data
Edited by Prof. Dr. Emanuel Bayer and Manuel Marini · Springer, 2026
The anthology shows how customer data becomes measurable value — with 22 contributions from academia and practice, structured along the five stages of the Customer Intelligence Evolution Framework (CIEF).
- Framework: Targets & Commitment, Data Integration, Data Quality, Insights, Use Cases
- Topics: Golden Record, Customer Data Platform, data enrichment, AI-driven personalization, compliance
- Practice: Field reports from companies including Commerzbank, Deutsche Bank, ADAC, Dun & Bradstreet and IKB
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