# Area of a Semicircle Calculator

Use our free online area of a semicircle calculator to find the area of a semi-circle using its radius. A semi-circle is half of a circle.

## Find the Area of a Semicircle

Use our free online area of a semicircle calculator to find the area of a semi-circle using its radius. A semi-circle is half of a circle.

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Just enter the value of radius in the area of a semicircle calculator to compute the semicircle area within a blink of an eye.

**Area of a Semi-Circle:**
A semi-circle is half of a circle. Area of semi-circle formula is derived from the formula of a circle. Hence the area of a semi-circle is just the half of the area of a circle.

**How to Find the Area of a Semicircle**
To find the area of a semi-circle, you need to know the formula for the area of a circle. This is because, a semi-circle is just the half of a circle and hence the area of a semi-circle is the area of a circle divided by 2. The area of a semi-circle with radius r, is (πr^{2})/2. π is a constant which is approximately 3.14 or 22/7.

### Example:

Find the area of a semicircle with a radius of 5cm?

#### Solution:

Semi Circle Area = (1/2) × π × 5^{2}

= 39.2699cm^{2}