Area Calculator - Calculate Area of Shapes Online
Free online area calculator for rectangles, circles, triangles, squares, and more. Calculate area with step-by-step formulas and examples.
Select Shape and Enter Dimensions
Area Result
Select a shape and enter dimensions to calculate area
About Area Calculator
The Area Calculator helps you calculate the area of various geometric shapes using their specific formulas.
Supported Shapes:
- Rectangle: Area = length × width
- Circle: Area = π × radius²
- Triangle: Area = ½ × base × height
- Square: Area = side²
- Parallelogram: Area = base × height
- Trapezoid: Area = ½ × (base1 + base2) × height
Applications:
- Construction and architecture
- Landscaping and gardening
- Flooring and carpeting
- Mathematics education
- Engineering calculations
Note: All measurements should be in the same units. The result will be in square units of the input measurement.
Frequently Asked Questions
How do I calculate the area of a rectangle?
To calculate the area of a rectangle, multiply the length by the width. Formula: Area = length × width.
What is the formula for circle area?
The area of a circle is calculated using the formula: Area = π × radius², where π (pi) is approximately 3.14159.
How do I find the area of a triangle?
The area of a triangle is calculated using: Area = ½ × base × height. Make sure to use the perpendicular height.
What's the difference between area and perimeter?
Area measures the space inside a shape (in square units), while perimeter measures the distance around the shape (in linear units).
Can I calculate area in different units?
Yes, you can use any unit of measurement (feet, meters, inches, etc.). Just make sure all measurements use the same unit.