Area Calculator
Calculate the area of various geometric shapes including rectangles, squares, triangles, circles, and polygons. Get instant results with step-by-step explanations.
Shape Selection
Shape Selection
Enter Measurements
What is Area?
Area is the measure of the space inside a two-dimensional shape. It's calculated in square units such as square centimeters (cm²), square meters (m²), square inches (in²), or square feet (ft²).
Area Formulas:
- Rectangle: A = length × width
- Square: A = side²
- Triangle: A = ½ × base × height
- Circle: A = π × radius²
- Parallelogram: A = base × height
- Trapezoid: A = ½ × (base₁ + base₂) × height
Applications of Area:
- Flooring and carpet calculations
- Painting and wallpaper estimation
- Land and property measurements
- Garden and landscaping planning
- Construction and architecture
- Material quantity calculations
Frequently Asked Questions
How do I calculate the area of a shape?
Each shape has its own formula: rectangle = length × width, circle = π × radius², triangle = ½ × base × height. Select your shape and the calculator applies the right formula.
What units is area measured in?
Area is measured in square units — square meters (m²), square feet (ft²), square centimeters (cm²), and so on. Always square the linear unit you measured with.
How do I find the area of a circle?
Multiply pi (about 3.14159) by the radius squared: A = πr². For a radius of 5, the area is π × 25 ≈ 78.54 square units.
How do I calculate the area of a triangle?
Multiply the base by the height and divide by two: A = ½ × base × height. A triangle with base 10 and height 6 has an area of 30 square units.