Perimeter Calculator
Calculate the perimeter/circumference for square, rectangle, triangle, circle, parallelogram, trapezoid, and ellipse.
Source / method note
This calculation is based on basic geometry perimeter formulas. The Ramanujan approximation is used for the ellipse perimeter.
Legal / official rate note
This tool does not replace engineering, architectural, construction, land surveying, or official measurement. Authorized measurement and project data should be based on for sensitive projects.
