Geometry - Octagon Calculator

• Enter side (s) length:

• Side (s): units

• Triange Base/Height (k): units

• Perimeter (P): units

• Length (L): units

• Diameter (D): units

• Area (A): units2


• Inner Right-Triangle Area (ATriangle): units2


• Inner Rectangle Area (ARectangle): units2


• Inner Square Area (ASquare): units2


Here's a Regular Octagon Calculator. Feel free to use/inspect the code. Check out my blog post, Geometry Corner :: Octagon Measurements, and I post how I arrived at the formulae giving the results above. Enjoy!