Open this calculator for cases where a small arithmetic slip would otherwise force a full restart around regular dodecagon circumradius.
Enter job values, review the estimate, then use the decision hints before ordering or quoting.
circumradius = side / (2 x sin(pi / 12))The circumradius is the distance from the polygon center to any vertex in a regular dodecagon.
Each side and angle must match for the formula to hold.
This tool works well for focused work where you only want one formula and one answer path around regular dodecagon apothem.
Next: regular dodecagon area.
Keep this page handy for situations where a hand calculation would be slow or easy to miscopy around regular dodecagon perimeter.
Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.