Circle Area Calculator
Calculate the area of a circle using its radius.
Calculator
Enter Circle Dimensions
Table of Contents
Concept
What is Circle Area?
The area of a circle is the amount of space enclosed within its boundary. It's measured in square units and is calculated using the circle's radius.
Formula
Circle Area Formula
Circle Area Formula
A = πr²
where A is the area, π (pi) is approximately 3.14159, and r is the radius
Steps
How to Calculate Circle Area
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1Measure the radius of the circle
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2Square the radius (multiply it by itself)
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3Multiply the squared radius by π (pi)
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4The result is the area of the circle
Examples
Practical Examples
Example 1
Calculate the area of a circle with radius 5 units
A = πr²
A = π(5)²
A = π(25)
A ≈ 78.54 square units
Example 2
Calculate the area of a circle with radius 3.5 units
A = πr²
A = π(3.5)²
A = π(12.25)
A ≈ 38.48 square units
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