Is there a command line calculator for byte calculations?

Question

Is there a command line calculator for linux where I can do the following;

 calc 560kB/12233kB

for example. Basic arithmetic desired and answers given as a decimal (in the case above) or with the appropriate SI prefix (kB, B, MB, GB, etc.).

Could bc do the trick somehow?

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Solution

GNU Units does what I wanted to.

Answer 1

You can abuse bc for this if you remember that number unit actually is a shorthand for number * unit. One limitation of bc is that it only allows lower-case variables:

b=1
kb=1024
mb=1024*kb
...

scale=20
(560*kb)/(12233*kb)
.04577781410937627728

The next thing that I could think of is Python together with the units package.