Semicircle Area Calculator
Calculate the area of a semicircle with detailed steps
Enter Dimensions
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Visualization
r
d = 2r
A semicircle is half of a circle. The diameter (d) is twice the radius (r).
Calculation Result
0
square units
Area of Semicircle
Calculation Steps
Semicircle Area Formula
A = (π × r²) / 2
or
A = (π × d²) / 8
Where:
A = Area of the semicircle
r = Radius of the semicircle
d = Diameter of the semicircle (d = 2r)
π ≈ 3.14159