http://www.ergonomics-info.com/image-files/desk_ergonomics.jpg http://www.ergonomics-info.com/image-files/desk_ergonomics.j... Start with your chair, since you

http://www.ergonomics-info.com/image-files/desk_ergonomics.jpg http://www.ergonomics-info.com/image-files/desk_ergonomics.j... Start with your chair, since your legs are a fixed length. Your chair height should depend on that, not your desk height. Then hold your arms out at the appropriate level and measure to the floor. That is your top-of-keyboard height, so your desk top should probably be about an inch shorter than that. Then just ensure your desk has clearance for your legs given the heights. For my custom desk, I had to cut short the apron as I had made it too tall. Also realize that you have some leeway in the angle of your legs and arms, and that you really must be sitting up straight. (Ask someone if you are!)