Help with Non-metric Hemholtz Calculator

I need a hemholtz calculator that provides inches and feet instead of milimeters. Can anyone help? I plan to begin building bass traps and wall traps very soon and need this calculator to help me prior to purchasing the materials. Thanks for this very insightful site! Michael

Here ya go - slot width is in fractions of an inch, all other blue entries are in decimal inches, like 5.5 for a 1x6 that's 5-1/2" wide - Been meaning to do this for a while, thanks for the push... Steve

Doh! I edited the calculator to convert to inches.... I should have just asked :oops:

Thanks Knightfly, you have saved me alot of work converting from metric to American Standard measurements! BTW, what does your name, "Knightfly" mean? Michael

Long story, only part of which is me being a fan of Donald Fagen... Steve