How many KB's in a MB?

Dear mtnpdlr,

1024 KB are in 1 MB.

Source:
Imperial College London, Department of Computing: Free Online
Dictionary of Computing
http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?query=megabyte&action=Search

Regards,
Scriptor

If you are talking about computer memory, it's 1,024.  In the contexts
of disk storage and network speeds, it's more likely to be 1,000, but
could be either.  Correspondingly, a kilobyte may be 1,000 or 1,024
bytes.

http://www.pcguide.com/intro/fun/bindec-c.html

http://physics.nist.gov/cuu/Units/binary.html

I appreciate your clarification.  I am new to computers and thought
your original answer was vague.  Thanks for adding more information.

Dear mtnpdlr,

If my answer was too vague for your taste, you could have asked for
clarification before giving me a bad rating.

Regards,
Scriptor

Three stars is not all that bad a rating.  It is fairly well known
that this definition can vary depending on the context.  In addition a
GB can be 1000 MB or 1024 MB, and depending on how MB is defined can
therefore be 1000x1000 or 1000x1024 or 1024x1024 KB.