Circle with Radius 3
A circle with radius 3 has an area of approximately 28.27 square units and circumference of 18.85 units.
How to use this tool
- Enter radius in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your area and the full breakdown beneath it.
A circle with radius 3 has area 9π ≈ 28.27 square units and circumference 6π ≈ 18.85 units.
Frequently asked questions
- How do you calculate circle area and circumference?
- Area = π × r², Circumference = 2 × π × r, where r is the radius and π ≈ 3.14159.