Calculate polygon area for regular polygons or coordinate-based polygons. Estimate perimeter, apothem, side length, square feet, square yards, square meters, acres, material units, waste, and project cost.
Regular polygon by side length:
The calculator uses the number of sides and side length to estimate perimeter, apothem, and area.
Regular polygon by apothem:
The calculator uses perimeter and apothem to calculate polygon area.
Regular polygon by circumradius:
The calculator uses the outside radius and number of sides to estimate side length, perimeter, apothem, and area.
Coordinate polygon mode:
The calculator uses ordered x,y points and the shoelace formula to estimate polygon area and perimeter.
A polygon area calculator helps estimate regular and custom polygon-shaped areas for patios, lots, gardens, flooring, landscaping, design layouts, construction shapes, and geometry problems.
It can help calculate square feet, square yards, square meters, acres, perimeter, apothem, side length, material quantity, waste, material cost, labor cost, and estimated total cost.
Your result shows polygon area, area with waste, perimeter, side length, apothem, square yards, square meters, acres, material units, material cost, boundary cost, labor cost, and estimated total cost.
Multiply the polygon perimeter by the apothem, then divide by 2. The formula is area equals perimeter times apothem divided by 2.
Enter the x,y corner points in order around the polygon. The calculator uses the shoelace formula to estimate the enclosed area.
The apothem is the distance from the center of a regular polygon to the midpoint of one side.
Yes. Use the coordinate points mode for custom or irregular polygons. Enter each corner point in order around the shape.
It is exact for clean mathematical inputs, but real project estimates can vary by measurement accuracy, uneven boundaries, slopes, exclusions, waste, rounding, and installation method.