Quarter Circle Area Calculator
Calculate the area of a quarter circle (1/4 of a circle) using radius. Area = (π × r²) / 4.
Formula
Area = (π × r²) / 4
- Quarter circle = 1/4 of full circle
- Full circle area = π × r²
- Quarter circle area = (π × r²) / 4
- Common in circular sector calculations and geometry problems
Example
Inputs
- Radius: 5
Radius 5: Area = (π × 5²) / 4 = (π × 25) / 4 ≈ 19.63 square units.
Frequently asked questions
What's the difference from full circle?
A quarter circle is 1/4 the area of a full circle. Full circle: πr², Quarter circle: πr²/4.
What units should I use?
Radius in any length unit (cm, m, ft); result area is in that unit squared.