Use these circle calculators below and choose and click to sketch for calculations you need. You can find there formulas, sketch and practical use of calculations.
Use calculators to make circle calculations of radius, diameter, circumference (perimeter), area (circular area), chord height (sagitta, arc height), arc length, circle segment, circle sector angle.
- Circle center is the point within a circle that is in same distance from all other points on the circle.
- Circle radius is any of the line segments from its center to its perimeter
- Circle diameter is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle.