Measured in binary, a 1 terabyte hard drive has 1,048,576 megabytes of storage space. Hard drive storage space is calculated in bits, and 8 bits of data are in 1 byte; 1,024 bytes equals 1 kilobyte, and 1 terabyte equals 1,099,511,627,776 bytes.
Although operating systems read the amount of space in a hard drive using the binary method, computer storage manufacturers generally market their hard drives' unformatted capacity in decimal mathematics. Using this method to calculate capacity, an unformatted 1terabyte hard drive can store 1,000,000 megabytes of data. The International Electrotechnical Commission has introduced the new binary prefixes "mebi," "gibi" and "tebi" to resolve the discrepancy, although they are seldom used.
1 terabyte = 1 048 576 megabytes.
http://wiki.answers.com/Q/How_many_megabytes_to_a_...

1 terabyte = 1,000,000 megabytes. To convert a value in terabytes to megabytes, multiply by 1,000,000.
http://www.kgbanswers.com/howmanymegabytesarei...

1 Megabyte = 0.0009765625 Gigabytes, 1024 Megabytes = 1
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1024 kb = MB 1024 MB = GB and so on
http://answers.yahoo.com/question/index?qid=200812...
