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Interactive, free online geometry tool from GeoGebra: create triangles, circles, angles, transformations and much more!
Interactive geometry calculator. Create diagrams, solve triangles, rectangles, parallelograms, rhombus, trapezoid and kite problems.
Use this area calculator to easily calculate the area of common bodies like a square, rectangle, triangle, circle, parallelogram, trapezoid, ellipse, regular octagon, and sector of a circle. Formulas and explanations on finding the area of any shape are below.
This calculator allows you to find the surface area of the most common shapes – rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram. Since area describes the size of a surface, this calculator can be used as a land area calculator.
Select the shape you want to calculate from the “Shape” dropdown. Input the required parameters (e.g., radius for a circle, length and width for a rectangle, base and height for a triangle). Click the “Calculate” button to compute the area and perimeter.
To calculate the area of an irregular shape: Divide the shape into several subshapes for which you can do the area calculations easily, like triangles, rectangles, trapezoids, (semi)circles, etc. Calculate the area of each of these subshapes. Sum up the areas of subshapes to get the final result.
Area calculation can be simple or complex, depending upon the shape and dimensions of the area you are trying to measure. For basic geometric shapes like rectangles, square, and triangles, a simple length-by-width, side square, or base-times-height formula works well.
