How high should your computer chair sit?

[johnjohn320]

Inspired by another thread, got me thinking:

In order to avoid problems with circulation, carpel tunnel, etc, as much as possible, how high should your chair be sitting? Some might just say "where ever is comfortable for you" but I've had this chair at the same height for so damned long that I'm used to it even it's unhealthy.

 

[Soybomb]

I haven't actually searched much but I thought your hands should be roughly parallel to your typing surface with your elbows at 90 degrees. If your chair is too low you reach up and if its too high you're reaching down. Could be wrong too 😀