Circle Calculator
Calculate the area and circumference of any circle. Simply enter the radius and let the tool handle the constant of $\pi$ for you.
Total Area ($A$):
0
Circumference ($C$):
0
The Geometry of a Circle
A circle is defined by its Radius ($r$), which is the distance from the center to any point on the edge. The Area represents the total space inside the circle, calculated as $\pi r^2$. The Circumference is the total distance around the edge, calculated as $2\pi r$. This tool uses the high-precision value of $\pi$ (approximately 3.14159) to give you the most accurate results possible.
Frequently Asked Questions
What is the value of $\pi$ (Pi)? +
$\pi$ is a mathematical constant representing the ratio of a circle's circumference to its diameter. It is roughly equal to 3.14159, or the fraction $22/7$.
What is the difference between Radius and Diameter? +
The Radius is the distance from the center to the edge. The Diameter is the distance from one edge to the other, passing through the center. Diameter is exactly twice the length of the radius ($d = 2r$).
How do I find Area if I only have the Diameter? +
First, divide your diameter by 2 to find the radius. Then, enter that radius into this calculator to find the Area and Circumference.
What units should I use? +
The tool is unit-neutral. If you enter the radius in centimeters, the area will be in square centimeters ($cm^2$) and the circumference will be in centimeters ($cm$).
No comments:
Post a Comment