Use this free circumference calculator to find the area, circumference and diameter of a circle.

In geometry, the circumference (from Latin circumferēns 'carrying around, circling') is the perimeter of a circle or ellipse. The circumference is the arc length of the circle, as if it were …

Aug 3, 2023 · The circumference of a circle is the distance around the boundary of the circle. It is the same as calculating the perimeter of any polygon such as triangle, square, and rectangle.

Oct 7, 2025 · Keep reading for everything you need to know about how to figure out the circumference of a circle using either the diameter or the radius. We've even got a …

Use this calculator to easily calculate the circumference of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc. If you know the diameter, first divide it by …

The formula for circumference is based on the constant π (pi), which is an irrational number approximately equal to 3.14159. π is the ratio of the circumference to the diameter of any circle.

The perimeter of a circle is called the circumference and is the linear distance around the edge of a circle. The circumference of a circle is proportional to its diameter, d, and its radius, r, and …

What is Circumference? Circumference is basically the length when measured through the boundary of a circle. It is same as the perimeter of other polygons, just that it has a special …

What is circumference anyway? Answer: The circumference of a circle is the edge or rim of a circle itself. It is the equivalent of 'perimeter' for a circle. The glowing part in the circle above is …

Use our simple calculator to find the circumference of a circle. Learn how to solve circumference problems with our step-by-step guide.