Circle Calculator
Calculate area and circumference
Input Parameters
Configure the system requirements below.
Instructions & Terms
What is a Circle Calculator?
A circle calculator computes area, circumference, diameter, and other properties of a circle from any known measurement (radius, diameter, or circumference).
How to Use This Calculator
Enter radius, diameter, or circumference. The calculator automatically computes all other values.
Circle Formulas
- Area: πr²
- Circumference: 2πr or πd
- Diameter: 2r
Uses
- Construction projects
- Land measurement
- Engineering
- Everyday calculations
FAQ
What is π (pi)?
Pi ≈ 3.14159. It's the ratio of circumference to diameter.
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System Maintenance & Support Nodes