This online circle area calculator will help you calculate the area of a circle. The solution can be found by three different methods.
Using this calculator, you can get a detailed step-by-step solution with an explanation and output of formulas.

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Method of calculating the area of the circle

Radius R:

Diameter d:

Length L:

A circle (circle) is a geometric figure on a plane, all points of which are equidistant from a given point (the center of the circle).
Circle area formula The formula for the area of the circle through the radius where R is the radius of the circle

A circle (circle) is a geometric figure on a plane, all points of which are equidistant from a given point (the center of the circle).
Circle area formula Formula for the area of a circle through diameter where d is the diameter of the circle

Solution:

Finding the area of a circle with this online calculator is very simple. It is enough to perform a few simple actions:

Choose the way to find the area. The choice of method depends on the data you have.
Enter the circle data in the appropriate field.
Click the "Calculate" button and the result with a step-by-step solution will appear on the screen

A circle (circle) is a geometric figure on a plane, all points of which are equidistant from a given point (the center of the circle).

Download all formulas in Word format

Last 20 calculations on this calculator

krgua area with radius 1 equal to 3.142
krgua area with radius 2 equal to 12.566
krgua area with radius 78537500 equal to 1.9377208373984E+16
krgua square with perimeter 3.14 equal to 0.785
krgua square with perimeter 7 equal to 3.899

Let us know about the problem that has arisen as a result of the calculation on this calculator.

After the calculation, click on the button 'The calculation is not correct' if you find an error. Or click 'calculation is correct' if there are no errors.