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I have made 22.25" diam. round cauls. I multiplied the diam. x 3.14 to get the circumference. I cut my whacky wood (5/16 thick) to length however it came up an inch short. Can someone help me with figuring out the proper math on this? MC
You didn't account for your thickness of material (5/16"). Your should have used your diameter plus your thickness times pie to get your length.
Your diameter is actually 22.25 +2x5/16
I come up with 71.86 but a better way to do this is to rip a narrow test strip and wrap it around the form and mark it accordingly.
Even genius rocket scientists crash multi-million dollar martian landers over stupid math mistakes.