This circle perimeter calculator finds the perimeter (p) of a circle if you know its radius (r) or its diameter (d), and vice versa.

If we know the value of the circumference or the perimeter of a circle, then by substituting the value in formula we can calculate radius. Therefore, R = (perimeter of circle)/ 2π.

Jul 23, 2025 · Circle formulae are basic formulas of circles in geometry. The formula for calculating a circle's circumference, or perimeter, is C = πd or C = 2πr, where "d" is the …

Use the calculator above to calculate the properties of a circle. Enter any single value and the other three will be calculated. For example: enter the radius and press 'Calculate'. The area, …

4 days ago · A circle is a simple close curve, with a set of all points at a constant distance from a fixed (centre) point, in the same plane. The formula 2πr gives the perimeter (circumference) of …

Aug 1, 2025 · Use this circle calculator to find the area, circumference, radius or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three …

We know the formula to find the perimeter of the circle if the diameter is given, namely π· D. Substitute the diameter 4.4 and Pi value as 3.14 in the above formula.

Perimeter is the distance around a two-dimensional shape. 3 + 3 + 3 + 3 + 3 = 5×3 = 15. The perimeter of a circle is called the circumference:

There are many circle formulas, such as the area of a circle formula, circumference formula, and diameter formula, all of which are discussed below along with the equations for a circle. The …

Jun 13, 2025 · The standard formula for calculating a circle’s perimeter is C = 2πr, where C represents the circumference, π (pi) is the mathematical constant approximately equal to …