Why does capitalization matter?
Lowercase b means bit and uppercase B means byte. One byte is eight bits.
Data Transfer Rate Converter
Convert decimal bit rates and byte rates with explicit unit symbols.
Decimal SI rates: bit units use lowercase b, byte units use uppercase B, and 1 B = 8 bit. Binary prefixes use Ki, Mi and Gi.
Formula and conventions
k = 10³, M = 10⁶, G = 10⁹; 1 B = 8 bit. Decimal bit/s and byte/s are converted through bit/s.
Worked example
100 Mbps ÷ 8 = 12.5 MB/s.
This converter uses decimal SI prefixes. Binary prefixes such as Ki and Mi represent powers of two and are not silently substituted.
Frequently asked questions
Are these binary-prefix conversions?
No. This tool uses decimal SI prefixes. Binary units use distinct prefixes such as Ki and Mi.
Does a converted rate guarantee download performance?
No. This is a unit conversion; actual transfer throughput depends on the connection and other conditions.
Official sources
- NIST SP 330, Section 3: Decimal multiples and sub-multiples of SI units
- NIST: Definitions of the SI units — The binary prefixes
Reviewed .