Number system conversion

[enos]

Can anyone point out any good sites or methods so I can learn to convert back and forth from denary, binary, hex, oct etc?

Please help with any links on where I can learn this

[ComputerJy]

ppt file (eddev.coe.ttu.edu/assistants/paniagua/presentations/Class21.ppt) or pdf file (http://claymore.engineer.gvsu.edu/~jackh/books/plcs/chapters/plc_numbers.pdf) pick the one you want, they are both good