Area of a SemiCircle Calculator

Welcome to our Area of a SemiCircle Calculator page.

We explain how to find the area of a semicircle and provide a quick calculator to work it out for you, step-by-step.

Area of a SemiCircle Calculator

Area of a SemiCircle Calculator

Answer1


Answer2

 
 

How the Calculator Works

area of a semicircle formula image

  1. Select if you want to use the radius or diameter (default is radius).
  2. For the value, you can choose a whole number, decimal or fraction.
    • You can type a fraction by typing the numerator then '/' then the denominator.
    • You can type a mixed number by typing the whole-number part, then a space then the fraction part.
    • Examples: 2 1/2 (two and one-half); 3 4/5 (three and four-fifths); 7 1/3 (seven and one-third).
  3. Choose your units of measurement (default is cm)
  4. Choose your desired accuracy (default is 2 decimal places)
  5. Click the Find Area button
  6. You will be given two answers for the area, one in terms of Pi (π) and the other answer as a decimal value.

Area of a Semi Circle Formula

The area of a semicircle is equal to half of the area of the whole circle.

area of semicircle formula image

So the area of a semicircle is ½ πr2, where r is the radius of the circle.

How to Find the Area of a SemiCircle Support

We hope that our calculator provides with useful step-by-step instructions for finding the area of a semicircle.

If you would like some more help and support try our Area of a SemiCircle support page.

There are lots of worked examples, as well as worksheets and some word problems to solve.

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More Area Calculators

We have a range of other area calculators to help you find the area of a range of different 2d and 3d shapes.

More Area Support and Resources

We have a range of other area worksheets and support pages for a range of different 2d shapes.

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