Area of a Circle Calculator

Use this Area of a Circle calculator to easily and quickly calculate the area of a circle, given its radius in any metric

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About Area of a Circle Calculator

The “Area of a Circle Calculator” is a user-friendly tool that helps determine the area of a circle based on its radius. Simply input the radius of the circle and select the preferred unit of measurement, such as centimeters, meters, or miles. On clicking the “Calculate Area” button, the calculator employs the formula πr² (pi times the square of the radius) to compute the area and displays the result in the chosen unit. This convenient tool streamlines the process of finding a circle’s area, making mathematical calculations quick and accessible for everyone.

Area of a circle calculation formula

How do we calculate the area of a circle here? This is about to understand. First of all we will need the formula to calculate the area of a circle. The formula we have given below. The formula for finding the area ( $A$ ) of a circle is given by -

$� = � �^{2}$

Area of a circle calculation example

Now we will use the formula given above here. And on the basis of this formula we will calculate the area of the circle. If the radius ( $r$ ) is given as 100 cm, you can substitute this value into the formula -

$� = � \times 10 0^{2}$

Now, calculate the area

$� = 3.14159 \times 10, 000$

$� \approx 31, 415.9$

So, the area of a circle with a radius of 100 is approximately $31, 415.9 {cm}^{2}$ .

How is the area of a circle calculated ?

To calculate the area of a circle, it is necessary to measure the radius. And if you have the measurement of the diameter of the circle then you have to do the diameter of the circle / 2. Now you will get the measurement of the radius of a circle. Once you have determined the circle’s radius or diameter, or if you know it from blueprints and schematics, the calculation is simple. Simply enter the values into the preceding formulae, or use our Area of a Circle Calculator . Keep in mind that the diameter is the maximum measurement you may obtain from a circle if you are measuring it by hand.