This page is tuned for clean geometry checks during drafting or homework around regular icosahedron surface area.
Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.
Enter job values, review the estimate, then use the decision hints before ordering or quoting.
surface area = 5 x sqrt(3) x edge^2With 20 equilateral triangles on the surface, the icosahedron area collapses into a short exact formula.