Geometry Tool

Area Calculator

Calculate the area of various 2D geometric shapes.

Rectangle Square Quadrilateral Parallelogram Triangle Circle

Formula: Area = length × width

Formula: Area = side × side

Formula: Area = ½ × diagonal × (sum of offsets)

Formula: Area = base × corresponding height

Formula: Area = ½ × base × height

Heron's Formula:

Semi Perimeter × ( Semi Perimeter - Side 1 ) × ( Semi Perimeter - Side 2 ) × ( Semi Perimeter - Side 3 )

Formula: Area = π × radius × radius