Circle area online calculator

In construction, circles are quite common. They are used for various purposes: in foundations, windows, during repairs. The calculator will help you quickly calculate the area of ​​a circle. To do this, enter the values ​​and get the result.

Diameter and area of ​​a circle

You need to enter data in meters, and the result is obtained in square meters – . The proposed calculator calculates the area by radius, the formula is as follows:

S=πr²

Where:

  • S – the desired area,
  • r is the radius of the circle.

By diameter

If you need to calculate the area by diameter, then the calculator below will help.

The calculation formula in this case is:

S=π*d2/4

​Where d is the diameter of the circle.

Let’s calculate the number of paving stones of popular size 100 * 200, for a round platform under a brazier with a diameter 6 meters.

We enter the value of 6 meters into the calculator for calculating the diameter and get – 28,26 sq. We translate centimeters into meters and calculate the area of ​​uXNUMXbuXNUMXbone paving stone – 0,02 m².

It remains to divide the area of ​​uXNUMXbuXNUMXbthe circle by paving stones:   28,26/0,02=1 pieces.

The circle calculator will help you to make calculations, just enter the required data and get the answer.

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