I'm working on a project for the trunk of my car and I'm trying to build a trapezoid-shaped box with specific dimensions. The top depth is 6 inches, the bottom depth is 10 inches, the width is 31 inches, and the height is 19 inches. The front baffle is a vertical piece measuring 31 inches by 19 inches and made from 3/4-inch MDF, while the rest of the box is constructed with 1/2-inch MDF to save weight and maximize internal volume.
So, my question is, what dimensions should I use for the trapezoids on the sides? I've already messed up the cuts three times, which is costing me a lot in scrap MDF. I'm also looking for any affordable software that can help with this, preferably something under $100. I really want to stick with this design, so no suggestions for alternatives, please!
1 Answer
There are several CAD applications you could use to figure this out, like SketchUp, Sharp3D, Fusion 360, or Tinkercad. If you can share a quick sketch, I can help you work through it. Don't worry about the mistakes; it happens to everyone when they're starting out!

Thanks, that would be great! This is my first woodworking project, and I'm still getting used to my table saw. The other parts came out fine, so I’m hopeful I can nail this too!