Data Storage Converter | Binary & Decimal Units

Easily convert data storage units like kilobytes, megabytes, and gigabytes. Switch between binary and decimal systems for accurate calculations.

Value

From

Decimal (1000)

Binary (1024)

Result:

Understanding the Units: Binary vs. Decimal

The primary source of confusion in data storage comes from two different number systems used to define the units. This tool allows you to convert using either system.

Decimal System (Base 1000)

Used by manufacturers to market storage devices (HDDs, SSDs, USB drives). It uses powers of 1000.

1 Kilobyte (KB) = 1000 Bytes
1 Megabyte (MB) = 1000 KB
1 Gigabyte (GB) = 1000 MB

Binary System (Base 1024)

Commonly used for file sizes by many tools and historically by Windows (often labeled as “GB/MB” but calculated in powers of 1024). macOS Finder (since 10.6) reports sizes in decimal (powers of 1000). Linux/Unix tools vary.

1 Kibibyte (KiB) = 1024 Bytes
1 Mebibyte (MiB) = 1024 KiB
1 Gibibyte (GiB) = 1024 MiB

The Discrepancy: This is why a 1 Terabyte (TB) drive (1,000,000,000,000 bytes in decimal) shows ~931 GiB in tools that compute using 1024-based units. They divide by 1024³ instead of 1000³.

Data in Real-World Context

It can be hard to grasp what these large numbers mean. Select a data size below to see some real-world equivalents. These are approximations and can vary based on quality and compression.

A Brief History of Storage

The journey of data storage has seen exponential growth, from room-sized machines holding mere kilobytes to tiny chips holding terabytes.

1956: The IBM 305 RAMAC, the first computer with a hard disk drive, could store about 5 megabytes and weighed over a ton.
1980: The Seagate ST-506, the first 5.25-inch hard drive for microcomputers, held 5 megabytes.
1999: The IBM Microdrive offered 170 megabytes in a CompactFlash form factor.
2007: The first 1 terabyte hard drive was released, marking a major milestone.
Today: Consumer SSDs offer multiple terabytes of storage, and data centers manage exabytes of information, fueling the age of Big Data and AI.