Area Calculator
Calculate the area and perimeter of circles, rectangles, triangles, trapezoids, and ellipses
Frequently Asked Questions
How do I calculate the area of a circle?
Multiply pi (3.14159) by the radius squared. The formula is A = pi * r^2. For example, a circle with radius 5 has an area of approximately 78.54 square units.
What is the difference between area and perimeter?
Area measures the surface enclosed by a shape in square units, while perimeter measures the total length of the boundary around the shape in linear units.
How do I find the area of an irregular shape?
Break the irregular shape into simpler shapes like rectangles and triangles, calculate the area of each part, and then add them together.