Circumference of circle formula: Learn how to calculate the

Learn how to calculate the circumference of a circle using simple formulas (C=πd or C=2πr) . Understand its relation to radius & diameter, and explore real-life examples. Circle formulas are basic formulas used in geometry to solve various problems of circles and are used in solving various mathematical and other problems. Before moving with various circle formulas one must familiarise with the basic definition of a circle . "A circle is a basic geometrical shape in which all points on the circumference of the circle are equidistant from the centre of the circle ." In this article, we will learn about various circle formulas their uses and others in detail. Use this free circumference calculator to find the area, circumference and diameter of a circle . What is the formula for the circumference of a circle ? The circumference (C) of a circle is the distance around it. It's calculated using either C = 2πr (where 'r' is the radius) or C = πd (where 'd' is the diameter). 2.