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12 tools
This calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement.
Our arc length calculator can calculate the length of an arc of a circle and the area of a sector.
The area of a circle calculator will compute the surface of a circle using a radius or a diameter.
How many times will a coin rotate around another coin n a single revolution? The answer is not as easy as it may look!
With our circle theorems calculator, you can understand all of the different circle theorems!
This semicircle area calculator determines the area of a half circle, as well as the circumference of a semicircle.
Equation of a circle calculator finds a circle's radius and center coordinates on a Cartesian plane.
Use our square in a circle calculator to seamlessly determine fitting dimensions for squares in circles and circles in squares.
The string girdling Earth calculator can help you determine the extra string length needed to achieve a desired gap or the resulting gap achieved by splicing a given string length.
Use this tangent of a circle calculator to determine the length of tangent from a point on a circle.
Use this free circumference calculator to find the area, circumference and diameter of a circle.
Sector area calculator can find the sector area of a circle in the blink of an eye.