The Bit-to-Byte conversion will be a conversion from a bit to a byte. Bytes are a unit of digital data and the 8-bit byte is the most common convention used in computing today. the 8-bit common Byte is an arrangement of 8 bits most often used as a way of storing digital memory. The most often understood lowest units when considering digital memory are the bit and the byte.
Additional References:
Check out the Unit Conversions and Base Fundamental Units Conversion calculators for many more unit conversions like this one.