Area Calculator
Calculate the area and perimeter of common shapes β rectangle, circle, triangle, trapezoid, and ellipse.
Inputs
ft
ft
ft
ft
ft
Results
Area
300 sq ft
Perimeter70 ft
Area (metric)27.87 mΒ²
Area (acres)0.0069 acres
How to Use This Calculator
- Select the shape from the dropdown (rectangle, circle, triangle, trapezoid, or ellipse).
- Enter the required dimensions that appear for your chosen shape (e.g., length and width for a rectangle).
- Area formulas used: rectangle = l Γ w; circle = ΟrΒ²; triangle = Β½ Γ base Γ height; trapezoid = Β½(a+b)Γh; ellipse = Οab.
- Perimeter or circumference is also computed alongside area for each shape.
- All dimension inputs must be positive; units are not converted β ensure all dimensions use the same unit.
- For irregular polygons or composite shapes, break the shape into known sub-shapes and sum their areas.
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