Circle Calculator
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Circle Calculator
Calculate circle measurements including area, circumference, diameter, and radius. Enter any one measurement to find the others.
Results
Radius
Diameter
Circumference
Area
Circle Formulas
| Measurement | Formula | Description |
|---|---|---|
| Radius (r) | r = d/2 | Distance from center to edge |
| Diameter (d) | d = 2r | Distance across circle through center |
| Circumference (C) | C = 2πr = πd | Distance around the circle |
| Area (A) | A = πr² | Space inside the circle |
Common Circle Applications:
- Calculating wheel rotations and distances
- Designing circular objects and spaces
- Measuring circular areas for materials
- Engineering and construction calculations
- Geometry and mathematics education
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