Having decided to paint the container or to impose a curb stone on a round area, to calculate the amount of material, you need to know the circumference. Using our online calculator to calculate the circumference of a circle, you will immediately get accurate results.
Circle – it is a curve consisting of points equidistant from the center on the plane, which is also a perimeter.
Radius – a segment from the center to any point on the circle.
Diameter is a line segment between two points on a circle passing through the center.
You can calculate the circumference of a circle by diameter or radius.
Formula for calculating length by diameter:
L = πD
Where:
- L – circumference;
- D – diameter;
- π – 3,14.
Radius
If the radius is known, then we offer a calculator for calculating the circumference (perimeter) by radius.
In this case, the formula looks like:
L = 2πr
Where: r is the radius of the circle.
Calculation of the diameter
Sometimes it is necessary, on the contrary, to find out the diameter from the circumference. You can use the proposed online calculator for these calculations.