Bytes Converter
Instantly convert data storage values across Decimal (SI), Binary (IEC), and Network Bits. Understand 1 TB = 931 GiB Windows math with step-by-step arithmetic.
Base scale: 1,000,000,000 Bytes • Formats as ~0.93 GiB in Windows
Synchronized Storage Units
All Storage Units
26 UnitsLive calculated comparison across SI Decimal, IEC Binary, and Network Telecom standards.
Step-by-Step Conversion Arithmetic
Mathematical algebraic expansion through base byte normalization.
Any value is multiplied by its unit multiplier in bytes to establish a universal baseline.
Total base bytes are divided by the target standard divisor to calculate exact volume.
Windows Capacity Paradox: Why 1 TB Formats as 931 GiB
Drive makers sell drives in SI decimal (1 TB = 1,000,000,000,000 bytes). Microsoft Windows measures capacity in binary GiB (1,073,741,824 bytes) but confusingly displays the unit as "GB".
Plain-Text Itemized Storage Receipt
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Did You Know? Computer Storage Insights
The 1 TB = 931 GiB Windows Discrepancy
Storage manufacturers sell drives calculated in SI Decimal (1 TB = 1,000,000,000,000 bytes). Microsoft Windows calculates disk space using Binary Gibibytes (1 GiB = 1,073,741,824 bytes) but appends the label 'GB'. Dividing 1 trillion by 1,073,741,824 yields 931.32 GiB—your drive isn't missing space!
Digital Storage Standards: Decimal (SI) vs. Binary (IEC)
Comparing powers of 10 against powers of 2 across international computing standards:
| Prefix | Decimal (SI 10ⁿ) | Value in Bytes | Binary (IEC 2ⁿ) | Value in Bytes | Divergence (%) |
|---|---|---|---|---|---|
| Kilo / Kibi | KB (10³) | 1,000 B | KiB (2¹⁰) | 1,024 B | +2.40% |
| Mega / Mebi | MB (10⁶) | 1,000,000 B | MiB (2²⁰) | 1,048,576 B | +4.86% |
| Giga / Gibi | GB (10⁹) | 1,000,000,000 B | GiB (2³⁰) | 1,073,741,824 B | +7.37% |
| Tera / Tebi | TB (10¹²) | 1,000,000,000,000 B | TiB (2⁴⁰) | 1,099,511,627,776 B | +9.95% |
| Peta / Pebi | PB (10¹⁵) | 1,000,000,000,000,000 B | PiB (2⁵⁰) | 1,125,899,906,842,624 B | +12.59% |
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Frequently Asked Questions
Storage drive manufacturers specify and sell capacity using SI Decimal prefixes where 1 TB equals 1,000,000,000,000 bytes (10¹²). Microsoft Windows calculates disk space using IEC Binary Gibibytes where 1 GiB equals 1,073,741,824 bytes (2³⁰), but confusingly labels it as 'GB'. Dividing 1 trillion bytes by 1,073,741,824 yields approximately 931.32 GiB. Your drive is not missing any storage space; it is simply reported in binary gibibytes.
Decimal units (SI, Base-10) scale by powers of 1,000 (1 KB = 1,000 B, 1 MB = 1,000,000 B, 1 GB = 1,000,000,000 B) and are standard in consumer storage packaging, networking, and modern macOS/Linux. Binary units (IEC, Base-2) scale by powers of 1,024 (1 KiB = 1,024 B, 1 MiB = 1,048,576 B, 1 GiB = 1,073,741,824 B) and reflect the underlying binary architecture of RAM and Windows file systems.
Internet service providers (ISPs) advertise connection speeds in Megabits per second (Mbps or Mb/s, with a lowercase 'b'), whereas web browsers and file download utilities measure file transfer sizes in Megabytes per second (MB/s, with an uppercase 'B'). Because 1 Byte equals 8 Bits, a 100 Mbps broadband connection has a maximum theoretical download throughput of 12.5 MB/s.
In December 1998, the International Electrotechnical Commission (IEC) approved standardized binary prefixes—Kibibyte (KiB), Mebibyte (MiB), Gibibyte (GiB), and Tebibyte (TiB)—to eliminate decades of confusion and legal disputes arising from using metric kilo (1,000) to describe computer binary 1,024. Standards organizations including IEEE, NIST, and BIPM now officially mandate this distinction.
Yes, 100%. All arithmetic calculations, base-byte normalizations, and receipt formatting execute entirely inside your local browser using client-side JavaScript. Zero storage figures or personal data are ever transmitted to any remote server or external analytics service.