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Sources and Accuracy
Data storage conversions use byte as the reference unit and include both decimal and binary multiples.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
byte [B]
Definition
The byte is a digital storage unit commonly made of 8 bits.
History
The byte became a core computing unit as computer memory and character encoding systems standardized.
Current use
Bytes and their multiples are used for files, storage drives, memory, downloads, backups, and cloud capacity.
megabyte [MB]
Definition
The megabyte is a digital storage unit commonly equal to one million bytes in decimal usage.
History
Megabytes became common as computer memory, software, and file sizes grew beyond kilobytes.
Current use
Megabytes are used for photos, documents, apps, email attachments, mobile data, and downloads.