Digital Storage Units Explained
Digital storage measurement often causes confusion because of two competing measurement conventions:
- Decimal (SI / Base 10): Uses standard powers of 10 (). Hard drive manufacturers, SSD makers, and network telecom providers use this standard (e.g., ).
- Binary (IEC / Base 2): Uses powers of 2 (). Operating systems like Windows measure storage using binary chunks, often referring to () as a “Gigabyte”. This discrepancy is why a newly purchased 1 TB drive shows up as approximately 931 GiB in Windows Disk Management.
Metric vs. Binary Reference Chart
| Unit | Symbol | Base 10 (Bytes) | Binary Equivalent | Base 2 (Bytes) |
|---|---|---|---|---|
| Kilobyte | KB | Kibibyte (KiB) | ||
| Megabyte | MB | Mebibyte (MiB) | ||
| Gigabyte | GB | Gibibyte (GiB) | ||
| Terabyte | TB | Tebibyte (TiB) | ||
| Petabyte | PB | Pebibyte (PiB) |
Calculating Transfer & Download Times
Data transmission speeds are measured in bits per second (bps, Mbps, Gbps), while stored files are measured in Bytes (B, MB, GB).
Because 1 Byte = 8 bits, downloading an 800 MB file over an 800 Mbps internet connection does not take 1 second—it takes approximately 8 seconds under theoretical conditions. This converter automatically computes estimated download times across various connection tiers.