Area Calculator
Calculate area and perimeter or circumference for common geometric shapes.
Results
Formula Used:
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About the Area Calculator
What is an Area Calculator?
An area calculator computes the surface area of two-dimensional shapes and their corresponding perimeter or circumference. It is useful in construction, design, education, and everyday measurements.
How to Use
Select a shape from the dropdown, enter the required dimensions, and click Calculate. The tool shows area, perimeter or circumference, and the formula used.
What shapes are supported?
Rectangle, square, circle, triangle, trapezoid, parallelogram, and ellipse.
Are the formulas accurate?
Yes. All formulas use standard geometric definitions and π for circular shapes.
Can I use decimal values?
Yes. All input fields accept decimal numbers for precise measurements.
Is this calculator free?
Yes, BestCalc's area calculator is completely free with no ads or registration required.