Data Storage Converter — Bytes, KB, MB, GB, TB, KiB, MiB & More
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, kibibytes, mebibytes, and more. Free online data storage converter for IT, cloud computing, and file management.
Data Storage Converter
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The Formula
Data storage conversion uses linear scaling factors relative to the byte. The factor depends on whether you use decimal (SI) prefixes where 1 KB = 1,000 bytes, or binary (IEC) prefixes where 1 KiB = 1,024 bytes.
Variable Definitions
Byte
The fundamental unit of digital information storage. One byte consists of 8 bits and can represent a single character of text (e.g., the letter "A").
Decimal Storage Units
SI-prefix units where each step is 1,000. Used by hard drive and SSD manufacturers for marketing: 1 KB = 1,000 B, 1 MB = 1,000 KB, 1 GB = 1,000 MB, 1 TB = 1,000 GB.
Binary Storage Units
IEC-prefix units where each step is 1,024. Used by operating systems and memory manufacturers: 1 KiB = 1,024 B, 1 MiB = 1,024 KiB, 1 GiB = 1,024 MiB, 1 TiB = 1,024 GiB.
Petabyte
1 PB = 1,000 TB. Used for large-scale data centers, cloud storage, and big data applications. The entire internet generates about 2.5 PB of data per day as of 2024.
How to Use This Calculator
- 1
Enter the data size value you want to convert.
- 2
Select the current storage unit from the "From" dropdown (KB uses decimal 1,000; KiB uses binary 1,024).
- 3
Select the desired storage unit from the "To" dropdown.
- 4
The converted value is displayed instantly. Use this for file sizes, storage planning, or data transfer calculations.
Quick Reference
| From | To |
|---|---|
| 1 KB | 1,000 B (decimal); also ~0.977 KiB |
| 1 MB | 1,000 KB (decimal); also ~0.954 MiB |
| 1 GB | 1,000 MB (decimal); also ~0.931 GiB |
| 1 TB | 1,000 GB (decimal); also ~0.909 TiB |
| 1 KiB | 1,024 B |
| 1 MiB | 1,024 KiB = 1,048,576 B |
| 1 GiB | 1,024 MiB = 1,073,741,824 B |
| 1 TiB | 1,024 GiB = 1,099,511,627,776 B |
| CD (audio) | 700 MB / ~650 MiB |
| DVD (single layer) | 4.7 GB / ~4.38 GiB |
Common Applications
- Storage planning: calculating how many files fit on a drive given the difference between advertised (decimal) and OS-reported (binary) capacity
- Data transfer: estimating download/upload times based on file sizes and internet connection speeds (usually in bits per second)
- Software development: specifying memory allocation and file sizes correctly in code using the appropriate units
- Cloud computing: understanding cloud storage costs based on GB (decimal) or GiB (binary) depending on the provider
- Photography and video: converting between raw file sizes, compressed formats, and storage requirements
- Enterprise IT: planning data center capacity in TB, PB, or even EB (exabytes) for backups and archives
Data storage units. The gap between decimal (1,000) and binary (1,024) grows with each prefix: a "1 TB" drive gives only ~0.91 TiB of addressable space.
Understanding the Concept
Data storage measurement is complicated by two competing standards: decimal (SI) and binary (IEC). Hard drive and SSD manufacturers use decimal prefixes (1 GB = 1,000,000,000 bytes) because it makes their drives sound larger. Operating systems traditionally report in binary (1 GiB = 1,073,741,824 bytes), so a "500 GB" drive shows as about 465 GiB in Windows. This discrepancy is NOT false advertising — both are correct within their system, which is why this converter includes both. The IEC binary prefixes (KiB, MiB, GiB, TiB) were standardized in 1998 to end the confusion, but adoption remains inconsistent. The byte itself (8 bits) can store values 0–255 and represents a single text character. A kilobyte (KB) holds roughly a paragraph of text. A megabyte (MB) holds a high-resolution photo. A gigabyte (GB) holds a full-length HD movie. A terabyte (TB) holds about 1,000 hours of HD video. Modern data centers measure in petabytes (PB) and exabytes (EB). Understanding both decimal and binary units is essential for IT professionals, photographers, videographers, and anyone managing digital storage.
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