Circle Calculator
MathCalculate the area, circumference, and diameter of a circle from its radius.
Area
The total area enclosed by the circle (π × r²).
Circumference
31.416
The distance around the circle (2 × π × r).
Diameter
10.00
The distance across the circle through its center.
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Odeh Ahwal0people find this calculator helpful
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Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Frequently Asked Questions
How do you calculate the area of a circle?
The area of a circle is calculated as π (pi, approximately 3.14159) multiplied by the radius squared: Area = π × r².
What is the difference between radius and diameter?
The radius is the distance from the center of the circle to its edge. The diameter is the distance all the way across the circle through the center — exactly double the radius.
How is circumference calculated?
Circumference (the distance around the circle) equals 2 × π × radius, or equivalently, π × diameter.
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