Calculate the area of common 2D shapes including square, rectangle, triangle, circle, parallelogram, trapezoid, and ellipse. Enter your measurements, select the shape, and get the answer with a clear formula-based calculation.
Select a shape and enter the required dimensions. All results are shown in square units.
An Area Calculator is an online geometry tool that helps you measure the amount of flat space inside a two-dimensional shape. Instead of manually remembering different formulas for every shape, you can select the shape, enter the dimensions, and instantly see the calculated area with the formula used.
This tool is useful for students, teachers, homeowners, designers, builders, and anyone who needs fast and accurate area measurements. Whether you are calculating flooring, paint coverage, garden space, table surface, or a school geometry problem, this calculator gives a clean result in square units.
Choose the shape you want to calculate, such as circle, rectangle, triangle, or trapezoid.
Add the required values like radius, base, height, length, width, or side length.
The tool calculates the area and shows the formula so you understand the final answer.
Every shape uses a different formula. The table below shows the formulas used by this calculator.
| Shape | Formula | Required Values |
|---|---|---|
| Square | side × side | Side length |
| Rectangle | length × width | Length and width |
| Triangle | ½ × base × height | Base and height |
| Circle | π × radius² | Radius |
| Parallelogram | base × height | Base and height |
| Trapezoid | ½ × (base 1 + base 2) × height | Two bases and height |
| Ellipse | π × semi-major axis × semi-minor axis | Semi-major and semi-minor axis |
Manual area calculation can become confusing when you are switching between different shapes. This calculator keeps everything in one place and gives you a quick result with a simple breakdown. It is especially helpful when you want to compare multiple shapes, check homework, estimate material needs, or confirm measurements before starting a project.
Enter your values and calculate area instantly without complex manual work.
The answer includes the calculation formula, so the result is easier to understand.
The layout works smoothly on desktop, tablet, and mobile screens.
Area means the amount of space inside a flat two-dimensional shape. It is usually measured in square units such as square meters, square feet, square inches, or square centimeters.
Yes. You can use it for basic estimates such as flooring, wall space, garden planning, paint coverage, craft layouts, and simple construction measurements. For professional engineering or legal land measurements, always verify with a qualified expert.
You can use any unit, but keep all inputs in the same unit. For example, if length is in meters, width should also be in meters. The result will then be in square meters.
Circle area is calculated with the formula π × radius². Enter the radius in the calculator, and it will calculate the circle area automatically.
Area measures surface space, so the final answer is always written in square units. For example, 10 meters × 5 meters equals 50 square meters.