Circle Calculator: Find Area, Circumference, Radius & Diameter
Diameter:
10 units
Circumference:
31.42 units
Area:
78.54 square units
Understanding Circles: A Complete Guide
Key Circle Formulas
- • Diameter = 2 × radius
- • Circumference = 2 × π × radius
- • Area = π × radius²
Practical Applications
Circles are fundamental in:
- Engineering and construction (pipes, wheels, cylinders)
- Architecture (circular windows, domes, arches)
- Physics (orbital motion, waves, fields)
- Everyday objects (coins, plates, clocks)