converting mm to inches

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Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40582
Printed Date: May 13, 2025 at 1:44 PM

Topic: converting mm to inches

Posted By: supradude
Subject: converting mm to inches
Date Posted: October 09, 2004 at 5:56 PM

I need help on building a box. The external dimensions are 445mm width, 343mm high, 308mm deep. I need these converted to inches. Also, the net internal volume is 47 L. What is this in cubic feet? This is external measurments using 3/4" material. Thanks for any info, Lewis

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'85 Toy

Replies:

Posted By: JohnnyRocko
Date Posted: October 10, 2004 at 12:10 AM

divide your millimeters by 25.4 this converts to inches. Then you can multiply all your results and divide by 12 three times to get cubic feet. so approx. 17.52in W x 13.50in H x 12.13in D. or approx 1.66 cubic feet.

Now I realize no ones to know how to do math so just go to google and type in '47 liters in cubic feet' and it will give you an answer.

Posted By: heavilymedicate
Date Posted: October 10, 2004 at 12:33 AM

I know it is Uber hard to read the site menu, located to your left. However, had you taken a look you may have found this magic page: https://www.the12volt.com/caraudio/boxcalcs.asp#rec Convert your numbers to inches and plug them in. Remember to account for woofer displacement and ports.

Posted By: supradude
Date Posted: October 10, 2004 at 6:01 PM

Thanks for the help. I had never seen speakers that gave the dimensions in mm. Now I know the formula to convert mm to inches. Thanks again. Lewis

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'85 Toy

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