Digital data measurement is complicated by two competing unit systems — decimal (SI) units where 1 kilobyte equals 1,000 bytes, and binary (IEC) units where 1 kibibyte equals 1,024 bytes. This 2.4% difference compounds at every scale: 1 TB (terabyte, decimal) equals 1,000,000,000,000 bytes, while 1 TiB (tebibyte, binary) equals 1,099,511,627,776 bytes — a gap of nearly 10%. This is why a hard drive advertised as 1 TB shows roughly 931 GiB when formatted, confusing consumers who think storage is missing. Operating systems add to the confusion: Windows reports file sizes in binary units but labels them with decimal prefixes, while macOS switched to true decimal units in 2009. Network speeds are measured in bits per second (Mbps, Gbps), requiring a division by 8 to convert to bytes per second for download time estimates. This data storage converter handles all standard units from bits through petabytes in both decimal and binary systems, including bits per second for network calculations. Enter a value in any unit and instantly see the equivalent in every other unit, eliminating the mental math and unit confusion that plagues storage planning, bandwidth estimation, and data transfer calculations.
Decimal vs Binary Data Units
Two standards define data units: Decimal (SI) uses powers of 1,000 — 1 KB = 1,000 bytes. Binary (IEC) uses powers of 1,024 — 1 KiB = 1,024 bytes. The confusion between these standards is why a '1 TB' hard drive appears as ~931 GiB in Windows. Our converter shows both simultaneously.
Common Data Conversion Reference
1 byte = 8 bits. 1 KB = 1,000 bytes (decimal) or 1 KiB = 1,024 bytes (binary). 1 MB = 1,000 KB. 1 GB = 1,000 MB = 1 billion bytes. 1 TB = 1,000 GB = 1 trillion bytes. To convert Mbps to MB/s: divide by 8.