Okay, so in my early stages of home theater planning i came accross this site which explain's Sepmeyer's "golden ratios" for building a listening room.

Although the site was educational, i thought their calculator sucked. Since my design could work with one of two ratios, i needed a way to quicky test new dimensions as i tried to draw my floorplan. so i made my own calculator.

To use it enter only ONE dimension in the "Desired" column and click "calculate room sizes". If you're measuring in feet/inches it's best to enter dimensions in inches.