Circumference Calculator
Calculate the circumference (perimeter) of a circle from radius, diameter, or area. Get comprehensive results with visual diagrams and related circle properties.
Calculate Circumference from Radius
How to Use the Circumference Calculator
The Circumference Calculator determines the perimeter of a circle using any known circle property. Choose your input method from radius, diameter, or area, enter the value with your preferred units, and get instant results including all related circle measurements. The calculator uses the mathematical constant π (pi) to provide precise calculations and displays comprehensive circle properties for complete reference.
Understanding circumference is crucial in various applications including construction, engineering, manufacturing, and everyday measurements. Whether you're calculating the length of material needed to wrap around a circular object, determining the distance traveled by a wheel in one rotation, measuring pipe circumferences, or solving geometry problems, this calculator provides accurate results with clear visual representations to enhance your understanding of circular mathematics.
Multiply radius by 2π
Multiply diameter by π
From area to circumference via radius