Converting .bmp to .jpgFollow

I don't know where else to post this.

Does anyone know of a program or any way to convert .bmp pics to .jpg? Preferably a way to convert alot at one time, I have over 50 .bmp pics that are taking up alot of space. It was when I first started putting pics on the computer that I used .bmp, but now I save them as .jpg.