数据存储
About Data Storage Conversion
Data storage measurement quantifies digital information capacity—how much data a device can hold or a file occupies. As our digital lives expand with photos, videos, applications, and cloud services, understanding storage units becomes increasingly important for everyone from casual smartphone users to IT professionals sizing enterprise data centers and cloud infrastructure.
Storage uses two competing systems that cause widespread confusion: binary (base-2) used by operating systems and memory (where 1 KB = 1,024 bytes), and decimal (base-10) used by storage manufacturers and networking (where 1 KB = 1,000 bytes). This seemingly small difference compounds dramatically at larger scales—a "500 GB" drive shows only ~465 GB in your computer, and a "1 TB" drive appears as just 931 GB. The International Electrotechnical Commission (IEC) introduced distinct binary prefixes (KiB, MiB, GiB) to clarify this, though adoption remains inconsistent.
Our converter handles both binary and decimal systems and all common units, helping you make accurate capacity calculations whether you're comparing cloud storage plans, calculating backup requirements, or planning infrastructure upgrades.
Common Data Storage Conversions
| From | To | Multiply By |
|---|---|---|
| Bytes | Kilobytes (decimal) | 0.001 |
| Bytes | Kibibytes (binary) | 0.0009766 (÷1024) |
| Kilobytes | Megabytes (decimal) | 0.001 |
| Kibibytes | Mebibytes (binary) | 0.0009766 (÷1024) |
| Megabytes | Gigabytes (decimal) | 0.001 |
| Mebibytes | Gibibytes (binary) | 0.0009766 (÷1024) |
| Gigabytes | Terabytes (decimal) | 0.001 |
| Gibibytes | Tebibytes (binary) | 0.0009766 (÷1024) |
| Bits | Bytes | 0.125 (÷8) |
| Bytes | Bits | 8 |
Data Storage Unit Reference
Bit (b) – The smallest unit of data, representing a single binary digit (0 or 1). Fundamental to computing—all digital information is ultimately stored as bits. Network speeds and data transfer rates use bits (Mbps, Gbps), while storage typically uses bytes. Named by combining "binary" and "digit."
Byte (B) – Exactly 8 bits, the standard grouping for computer memory addressing. The fundamental unit for file sizes and storage capacity. Originally chosen to represent a single text character (ASCII uses 7-8 bits). Modern Unicode characters may use multiple bytes.
Kilobyte (KB/KiB) – Decimal: 1,000 bytes (SI standard). Binary: 1,024 bytes (2¹⁰, IEC kibibyte). Typical for small documents, configuration files, and simple web pages. The ~2.4% difference seems small but compounds at larger scales.
Megabyte (MB/MiB) – Decimal: 1,000,000 bytes. Binary: 1,048,576 bytes (2²⁰). Common for photos (2-5 MB), MP3 songs (3-10 MB), and small applications. A 4.7% difference between decimal and binary at this scale.
Gigabyte (GB/GiB) – Decimal: 10⁹ bytes. Binary: 2³⁰ bytes (1,073,741,824). Standard for smartphone storage, RAM, games, and HD movies. The 7.4% binary-decimal difference becomes noticeable at this scale.
Terabyte (TB/TiB) – Decimal: 10¹² bytes. Binary: 2⁴⁰ bytes. Modern hard drives, SSDs, and NAS systems. At this scale, the ~10% difference means a "4 TB" drive shows approximately 3.64 TiB in your operating system.
Petabyte (PB/PiB) – Decimal: 10¹⁵ bytes. Binary: 2⁵⁰ bytes. Used for enterprise storage arrays, cloud data centers, and big data analytics. Large organizations may store hundreds of petabytes. The decimal-binary difference exceeds 12% at this scale.
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