How do you calculate bytes?

 

Bit

• A "bit" is atomic: the smallest unit of storage
• A bit stores just a 0 or 1
• "in the computer it's all 0's and 1's bits
• Anything with two separate states can store 1 bit
• In a chip: electric charge = 0/1
• In a hard drive: spots of North/South magnestism = 0/1
• A bit is too small to be much use
• Greoup 8 bits together to make 1 byte

NOTE :- Everything in a computer is 0's and 1's. The bit stores just a 0 or 1: It's the smallest building block of storage.

Byte

• One byte = collection of 8 bits
• eg. 0 1 0 1 0 1 0
• One byte can store one character , eg. 'A' or 'x' or '$'

How do you calculate bytes?

The calculations is based on:


In the cases when used to describe data storage bits/bytes are calculated as follows:



    1 byte = 8 bits
    1 kilobyte (K / Kb) = 2^10 bytes = 1,024 bytes
    1 megabyte (M / MB) = 2^20 bytes = 1,048,576 bytes
    1 gigabyte (G / GB) = 2^30 bytes = 1,073,741,824 bytes
    1 terabyte (T / TB) = 2^40 bytes = 1,099,511,627,776 bytes
    1 petabyte (P / PB) = 2^50 bytes = 1,125,899,906,842,624 bytes
    1 exabyte (E / EB) = 2^60 bytes = 1,152,921,504,606,846,976 bytes



The period (.) is used as decimal separator.

How many digits are in 8 bytes?

Eight bytes contain 64 bits of information, so you can store 2^64 ~ 10^20 unique items using those bits. Those items can easily be interpreted as the integers from 0 to 2^64 - 1 . So you cannot store 302 decimal digits in 8 bytes; most numbers between 0 and 10^303 - 1 cannot be so represented. How do you calculate bytes?

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