Area Calculator
Calculate the area of common shapes: rectangle, triangle, circle, trapezoid, and ellipse.
How to Use This Calculator
Enter your values in the fields above and click "Calculate" to get instant results. This area calculator provides accurate results with step-by-step explanations.
Formula
Rectangle: A = l×w | Triangle: A = ½bh | Circle: A = πr²
Quick Examples
- Rectangle 10×5 = 50 sq units
- Circle r=10 ≈ 314.159 sq units
Frequently Asked Questions
How do I calculate the area of a circle?
Area = π × r², where r is the radius. For a circle with radius 5, area = π × 25 ≈ 78.54 sq units.
What is the difference between area and perimeter?
Area measures the space inside a shape (in square units). Perimeter measures the distance around the outside (in linear units).