Calculate the area of a circle quickly and accurately using the formula A = π × r². Free and online tool for geometric calculations, mathematics, and engineering. Ideal for students, teachers, and professionals who need to calculate circular areas.
What is Circle Area?
The area of a circle is the measure of the surface inside the circular perimeter. It is calculated by multiplying the square of the radius by the constant π (pi), approximately 3.14159.
Examples:
Radius = 5 cm → Area = 78.54 cm²
Radius = 10 m → Area = 314.16 m²
Formula: A = π × r²
π ≈ 3.14159
Calculator
Practical Example
Calculate the area of a circle with radius of 5 units