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Does the calculator in your applications folder do what you want?

It comes up with a basic view but go to the view menu option and select scientific.
 
Here is one of my favorites! :)

(Click on the image to launch it.)

It was the first scientific calculator that I used.

On a serious note, I think that the built in calculator may serve your binary needs. Launch the calculator, and then select programmer under the view menu.
 
Not quite sure what you are after, but there are some binary bits and pieces if you choose programmer rather than scientific from the view menu.

Hope this helps.

Edit: Beaten to it!
 
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