Math Tools

CircleCalculator

Calculate circle area, circumference, diameter, and radius. Solve for any circle measurement given one known value.

Circle Dimensions

Circle Properties

Area78.54sq ft
Circumference31.42ft

All Measurements

Radius (r)5.00 ft
Diameter (d)10.00 ft
Circumference (C)31.42 ft
Area (A)78.54 sq ft
Circle Constant (π)3.14159
Sphere Volume*523.60 cu ft

Circle Formulas

  • Area = π × r²
  • Circumference = 2 × π × r
  • Diameter = 2 × r
  • r = √(A/π)

Common Uses

  • Pipes and cylinders
  • Round tables
  • Garden circles
  • Pool covers

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