Semicircle Area Calculator

Calculate the area of a semicircle by entering either the radius, diameter, or the area to see the values of the other fields.

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What is a Semicircle?

A semicircle in geometry is a circle that is cut in half, the two halves are each a semicircle now. This half circle shape is often used in mathematical problems for both schooling and projects.

How to Calculate the Area of a Semicircle

The formula for finding the area of a circle is A = (πr2) / 2. In this equation, r is radius.

Semicircle - Frequently Asked Questions

A semicircle has two sides, a flat one and a curved one.

Our calculator can find the value of any of the fields when you simply enter a value into a single one of them. However, if your semicircle measurements are in different units, our calculator does not take that into account. If needed, you can use one of our converter calculators to ensure your values are all the same unit before using this tool.

Create Date: July 15, 2024

Last Modified Date: July 15, 2024